Test suites timing out

Currently a lot of test suites are timing out consistently:

TestDbNotificationListener - did not produce a TEST-*.xml file (likely timed out)
TestHCatHiveCompatibility - did not produce a TEST-*.xml file (likely timed out)
TestNegativeCliDriver - did not produce a TEST-*.xml file (likely timed out)
TestNonCatCallsWithCatalog - did not produce a TEST-*.xml file (likely timed out)
TestSequenceFileReadWrite - did not produce a TEST-*.xml file (likely timed out)
TestTxnExIm - did not produce a TEST-*.xml file (likely timed out)