Merge "Catch exceptions from backup runner"

trove/guestagent/backup/backupagent.py

@@ -76,9 +76,9 @@ class BackupAgent(object):
                                 **backup_state)
         LOG.debug("Updated state for %s to %s.", backup_id, backup_state)
 
+        try:
             with runner(filename=backup_id, extra_opts=extra_opts,
                         **parent_metadata) as bkup:
-            try:
                 LOG.debug("Starting backup %s.", backup_id)
                 meta = {}
                 meta['datastore'] = backup_info['datastore']