Disable SIP unit tests until they are repaired.

lib/testing.properties

@@ -4,7 +4,6 @@
 # A list of all tests that should be run by the test target of the project.
 net.java.sip.communicator.slick.runner.TEST_LIST=ConfigurationServiceLick \
  MetaContactListServiceLick \
- SipProtocolProviderServiceLick \
  NetworkAddressManagerServiceLick \
  FileAccessServiceLick \
  HistoryServiceLick \
@@ -18,6 +17,7 @@ net.java.sip.communicator.slick.runner.TEST_LIST=ConfigurationServiceLick \
  RssProtocolProviderServiceLick
 
 # MediaServiceLick \
+# SipProtocolProviderServiceLick \
 
 # Set the name of the meta contact list file to use during testing so that
 # we do not meddle with the file we're using while running the application