Revision 580745

HADOOP-1966 Make HBase unit tests more reliable in the Hudson environment.

Set hbase.root in test/hbase-site.xml; when running a test, the default does not work consistantly.

When a HBase mini cluster is started on top of an existing mini dfs cluster, it should not shut down the mini dfs cluster when the mini HBase cluster is shut down.

TestDFSAbort catches exceptions, prints the stack trace and re-throws the exception, so you can see when the exception happened in the log.

Catch runtime exceptions that were escaping from FSUtils.isFileSystemAvailable, enabling more reliable detection of dfs failure. HRegionServer also now checks to see if it is still accepting client requests.