HBASE-7778 [snapshot 130201 merge] Tests with sleep after minicluster shutdown fail due to interrupt flag.
    
Renamed JVMClusterUtil#shutdown's noWait -> wasInterrupted to make it obvious that final guard was incorrect



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290v2@1446155 13f79535-47bb-0310-9956-ffa450edef68