Metacat

Increased the serial version during the test.

Increase serial version during the test of updateSystemMetadata method.

Restore the commented out tests.

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.