Update VM Initializer for Netbox 2.7

The vm database model has changed in Netbox 2.7.
Therefore the initializer code, that was used before, broke.
As a user, you will need to update your virtual_machines.yml
file as follows:

- Make sure the status is spelled lowercase.

See the diff of this commit for further information how this is meant.

startup_scripts/230_virtual_machines.py

@@ -1,6 +1,5 @@
 from dcim.models import Site, Platform, DeviceRole
 from virtualization.models import Cluster, VirtualMachine
-from virtualization.constants import VM_STATUS_CHOICES
 from tenancy.models import Tenant
 from extras.models import CustomField, CustomFieldValue
 from ruamel.yaml import YAML
@@ -43,12 +42,6 @@ with file.open('r') as stream:
 
           params[assoc] = model.objects.get(**query)
 
-      if 'status' in params:
-        for vm_status in VM_STATUS_CHOICES:
-          if params['status'] in vm_status:
-            params['status'] = vm_status[0]
-            break
-
       virtual_machine, created = VirtualMachine.objects.get_or_create(**params)
 
       if created: