LU-2766 llite: don't ignore layout for group lock request

LU-2766 llite: don't ignore layout for group lock request

ignore_layout can be set for operations that layout won't be changed,
typically page operations. Ignoring layout change in group lock
request will confuse layout change code at LOV layer and hit
assertion.

Signed-off-by: Henri Doreau <henri.doreau@cea.fr>
Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Change-Id: I0f628e81d7f61a9b00ab2941ad3bcde4b32ecfe2
Reviewed-on: http://review.whamcloud.com/6828
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>