LU-6480 o2iblnd: leak cmid in kiblnd_dev_need_failover

LU-6480 o2iblnd: leak cmid in kiblnd_dev_need_failover

cmid created by kiblnd_dev_need_failover should always be destroyed,
however it is not the case in current implementation and we will leak
cmid when this function detected a device failover.

Signed-off-by: Liang Zhen <liang.zhen@intel.com>
Change-Id: Icc567593f50fd557d5a7d1642a65d4fe49e8b4c2
Reviewed-on: http://review.whamcloud.com/14603
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>