LU-3703 tests: skip getfattr part of sanity test 234

LU-3703 tests: skip getfattr part of sanity test 234

Test fails due to a known bug in the upstream getfattr command in
SLES clients.  Skip the failing part of the test to work around
this problem.

If the upstream fix already present in source and in RHEL releases ever
lands in SLES releases this mod can be removed.

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Change-Id: I153713dc0dd43178d16f3c5bdf79c7ce07b6bbef
Reviewed-on: http://review.whamcloud.com/7306
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>