Merge branch 'devel-2.2' into devel-2.3

* devel-2.2:
  QA: add tests for gnt-cluster modify -B
  LUSetClusterParms: fix validation of beparams

Conflicts:
	lib/cmdlib.py (reverted & applied manually the change)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>