LU-4429 llite: fix open lock matching in ll_md_blocking_ast()

LU-4429 llite: fix open lock matching in ll_md_blocking_ast()

In ll_md_blocking_ast() match open locks before all others, ensuring
that MDS_INODELOCK_OPEN is not cleared from bits by another open lock
with a different mode. Change the int flags parameter of
ll_md_real_close() to fmode_t fmode. Clean up verious style issues in
both functions.

Lustre-commit: 2b23ad0d183141dc25377f2d37de6e6e36ba1169
Lustre-change: http://review.whamcloud.com/8718

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Change-Id: Ic44ac8ac8c07b71d4c929d7d359bee881c6b05b0
Reviewed-on: http://review.whamcloud.com/9260
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>