Resolve ambiguity with apprise.plugins module namespace

While the namespace is physically made of modules, it has been amended
to be the namespace home for the corresponding notifier classes as well.

This turned out to confuse both humans and machines on various ends.

While it has apparently worked for a while, it croaks on Python 3.11
now, and is not considered to have been a good idea in general.

test/test_plugin_custom_xml.py

@@ -27,10 +27,10 @@ import re
 from unittest import mock
 
 import requests
-from apprise import plugins
 from apprise import Apprise
 from apprise import AppriseAttachment
 from apprise import NotifyType
+from apprise.plugins.NotifyXML import NotifyXML
 from helpers import AppriseURLTester
 
 # Disable logging for a cleaner testing output
@@ -53,16 +53,16 @@ apprise_url_tests = (
         'instance': None,
     }),
     ('xml://localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost?method=invalid', {
         'instance': TypeError,
     }),
     ('xml://user:pass@localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
 
         # Our expected url(privacy=True) startswith() response:
         'privacy_url': 'xml://user:****@localhost',
@@ -70,83 +70,83 @@ apprise_url_tests = (
 
     # Test method variations
     ('xml://user@localhost?method=put', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost?method=get', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost?method=post', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost?method=head', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user@localhost?method=delete', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
 
     # Continue testing other cases
     ('xml://localhost:8080', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user:pass@localhost:8080', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xmls://localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xmls://user:pass@localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     # Continue testing other cases
     ('xml://localhost:8080', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user:pass@localhost:8080', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xmls://user:pass@localhost', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         # Our expected url(privacy=True) startswith() response:
         'privacy_url': 'xmls://user:****@localhost',
     }),
     ('xml://user@localhost:8080/path/', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         'privacy_url': 'xml://user@localhost:8080/path',
     }),
     ('xmls://localhost:8080/path/', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         # Our expected url(privacy=True) startswith() response:
         'privacy_url': 'xmls://localhost:8080/path/',
     }),
     ('xmls://user:pass@localhost:8080', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     # Test our GET params
     ('xml://localhost:8080/path?-ParamA=Value', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     # Test our Headers
     ('xml://localhost:8080/path?+HeaderKey=HeaderValue', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
     }),
     ('xml://user:pass@localhost:8081', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         # force a failure
         'response': False,
         'requests_response_code': requests.codes.internal_server_error,
     }),
     ('xml://user:pass@localhost:8082', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         # throw a bizzare code forcing us to fail to look it up
         'response': False,
         'requests_response_code': 999,
     }),
     ('xml://user:pass@localhost:8083', {
-        'instance': plugins.NotifyXML,
+        'instance': NotifyXML,
         # Throws a series of connection and transfer exceptions when this flag
         # is set and tests that we gracfully handle them
         'test_requests_exceptions': True,
@@ -179,7 +179,7 @@ def test_notify_xml_plugin_attachments(mock_post, no_throttling):
     mock_post.return_value = okay_response
 
     obj = Apprise.instantiate('xml://localhost.localdomain/')
-    assert isinstance(obj, plugins.NotifyXML)
+    assert isinstance(obj, NotifyXML)
 
     # Test Valid Attachment
     path = os.path.join(TEST_VAR_DIR, 'apprise-test.gif')
@@ -213,7 +213,7 @@ def test_notify_xml_plugin_attachments(mock_post, no_throttling):
 
     # test the handling of our batch modes
     obj = Apprise.instantiate('xml://no-reply@example.com/')
-    assert isinstance(obj, plugins.NotifyXML)
+    assert isinstance(obj, NotifyXML)
 
     # Now send an attachment normally without issues
     mock_post.reset_mock()
@@ -239,7 +239,7 @@ def test_plugin_custom_xml_edge_cases(mock_get, mock_post, no_throttling):
     mock_post.return_value = response
     mock_get.return_value = response
 
-    results = plugins.NotifyXML.parse_url(
+    results = NotifyXML.parse_url(
         'xml://localhost:8080/command?:Message=test&method=GET'
         '&:Key=value&:,=invalid')
 
@@ -258,8 +258,8 @@ def test_plugin_custom_xml_edge_cases(mock_get, mock_post, no_throttling):
     assert results['qsd:']['Key'] == 'value'
     assert results['qsd:'][','] == 'invalid'
 
-    instance = plugins.NotifyXML(**results)
-    assert isinstance(instance, plugins.NotifyXML)
+    instance = NotifyXML(**results)
+    assert isinstance(instance, NotifyXML)
 
     response = instance.send(title='title', body='body')
     assert response is True
@@ -272,7 +272,7 @@ def test_plugin_custom_xml_edge_cases(mock_get, mock_post, no_throttling):
         'xml://localhost:8080/command?')
 
     # Generate a new URL based on our last and verify key values are the same
-    new_results = plugins.NotifyXML.parse_url(instance.url(safe=False))
+    new_results = NotifyXML.parse_url(instance.url(safe=False))
     for k in ('user', 'password', 'port', 'host', 'fullpath', 'path', 'query',
               'schema', 'url', 'method'):
         assert new_results[k] == results[k]