Whenever drivers throw exceptions during update_access,
share cannot be deleted, not even with force-delete.
Some drivers already do not throw exception in delete_share
in such cases, but update_access should still throw exception
if share is not found when allow_access or deny_access
are called.
This patch adds possibility for driver throwing a
ShareResourceNotFound exception to let the manager
know share does not exist in backend anymore.
Drivers that already handle this case in delete_share
(by not throwing exception) only need to change update_access.
Additionally, adding possibility of share being completely
deletable if force-delete is specified in API call.
Closes-bug: #1550377
Change-Id: Iccce421f60234bc031f01370319a8918104b099b
51d9649a48