HBASE-12252 IntegrationTestBulkLoad fails with illegal partition error

Signed-off-by: stack <stack@apache.org>
HBASE-12257 TestAssignmentManager unsynchronized access to regionPlans
HBASE-12258 TestHbaseFsck is flaky and has some multithreading issues

Signed-off-by: Elliott Clark <eclark@apache.org>