test_all: remove filefabric from integration tests

The filefabric test server doesn't seem to be working at all so remove
it from the integration tests pending revitalization.

fstest/test_all/config.yaml

@@ -127,10 +127,10 @@ backends:
      # This test doesn't work on a standard dropbox account because it
      # tries to set the expiry of the link
      - TestIntegration/FsMkdir/FsPutFiles/PublicLink
- - backend:  "filefabric"
-   remote:   "TestFileFabric:"
-   fastlist: false
-   extratime: 2.0
+ # - backend:  "filefabric"
+ #   remote:   "TestFileFabric:"
+ #   fastlist: false
+ #   extratime: 2.0
  - backend:  "googlecloudstorage"
    remote:   "TestGoogleCloudStorage:"
    fastlist: true