Eliminate queue -> cache mapping

Eliminate need to resolve cache based on the queue. This allows to share
the queue between cache instances. The queue still holds pointer to
a cache that owns the queue, but no management or io path relies on the
queue -> cache mapping.

Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com>
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@huawei.com>

src/mngt/ocf_mngt_flush.c

@@ -432,7 +432,7 @@ static void _ocf_mngt_flush_container(
 	fc->end = end;
 	fc->context = context;
 
-	req = ocf_req_new_mngt(cache->mngt_queue);
+	req = ocf_req_new_mngt(cache, cache->mngt_queue);
 	if (!req) {
 		error = OCF_ERR_NO_MEM;
 		goto finish;