LU-9057 lnet: fix static analysis issues

Fixed a set of issues found while running static analysis.

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: I22ddfdda86c979c7a300ab9df777efbdd5973ac5
Reviewed-on: https://review.whamcloud.com/26687


Tested-by: Jenkins
Reviewed-by: Olaf Weber <olaf@sgi.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>