LU-10866 pacemaker: Support additional mount options

Add support for additional mount options for pacemaker resources.
Logging is also added for the output of the mount and umount commands.

Signed-off-by: Jeremy Filizetti <jeremy.filizetti@gmail.com>
Change-Id: Ideca8e37b12015b9f455634c85295137e00b97fd
Reviewed-on: https://review.whamcloud.com/31836
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Joe Grund <jgrund@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>