Unmouting of the volume from service instance sometimes fails because
Windows clients tends to check the availability of shares even if not
mounted and the volume is in use then.
Fix finds out processes via smbstatus and kill them before unmounting.
Signed-off-by: Goutham Pacha Ravi <email@example.com>
(cherry picked from commit 2c9fbc75059ac724cd845317473b7df4a8dcdc35)
(cherry picked from commit 95d251e38b4b4526c862a428da93f568fe7a23ad)
(cherry picked from commit b07c2484b6f0d5165d867651fbc123280e7b012d)
(cherry picked from commit a26b027b73669efb2a99530574051d284595b264)