Metacat

Add more test to test the code to create branch obsolete chain.

Add a test method to test the update of the obsoletes and obsoletedBy fields.

Add the code to test a MN to call setReplicationStatus successfully.

Add the code to test that non-cn session can't call some methods like registerSystemMetadata, updateSystemMetadata and et al.

Use the getCNSession to replace the getTestSession which was a actual getCNSession.

Add the test to test new rules: cn and other client calling the method on the authoritative node can call the mn.update.

Add some thread sleeping time to make checking wait the process.

Deleted a unnecessary test class.

Make more cap for the testing.

Insert a document with different authoritative node id. So we can test querySystemMetadata by more cases.