Disable TestMultiTableInputFormat

I am going to try removing this test. There is something odd about it. When I compare the list of tests that succeed in a green test run, this one is often 'missing'. For example, see:

http://54.241.6.143/job/HBase-0.95/661/org.apache.hbase$hbase-server/consoleText

All tests 'passed'. Says

Tests run: 1587, Failures: 0, Errors: 0, Skipped: 17

Test run 659 just before it, http://54.241.6.143/job/HBase-0.95/659/, says:

Tests run: 1592, Failures: 0, Errors: 0, Skipped: 17

TestMultiTableInputFormat runs five tests so this could be the difference in test run numbers above.

I am going to remove this set of tests for now.

I am a little stuck when I have test runs where all tests 'complete' but yet the build fails. My zombie tracker doesn't trigger anymore so this is a new form of fail.