CLOUDSTACK-7700: Volume Snapshot Async Job returns Success for a failed

operation.

(cherry picked from commit 1e20600)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: minchen07

engine/storage/volume/src/org/apache/cloudstack/storage/volume/VolumeServiceImpl.java

@@ -1381,6 +1381,7 @@ public SnapshotInfo takeSnapshot(VolumeInfo volume) {
             snapshot = snapshotMgr.takeSnapshot(volume);
         } catch (Exception e) {
             s_logger.debug("Take snapshot: " + volume.getId() + " failed", e);
+            throw new CloudRuntimeException("Failed to take snapshot", e);
         }
 
         return snapshot;