Applied Manik's pull request (with some changes)
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- Changed Util.getTestStack() to include additional protocols
- Added unit test for https://issues.jboss.org/browse/JGRP-1679
- Added lock-id to correlate grant-lock requests and lock-granted/lock-denied requests (https://issues.jboss.org/browse/JGRP-1679)
- Made sending of lock requests non-OOB again: in tryLock(timeout), grant-lock and lock-granted requests/responses can pass each other
Added internal thread factory for internal thread pool (https://issues.jboss.org/browse/JGRP-1676)
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