[common] Add sys.exit(...)

Needed to get correct exit code from Click commands (otherwise always
return 0)

beat/cmdline/common.py

@@ -1172,6 +1172,7 @@ def delete_local(prefix, type, names):
 
     storage.remove()
 
+  sys.exit(status)
   return status
 
 
@@ -1217,7 +1218,7 @@ def delete_remote(webapi, type, names):
                    "reason: %s", type, webapi.platform, webapi.user,
                    six.moves.http_client.responses[status_code])
       status += 1
-
+  sys.exit(status)
   return status
 
 
@@ -1294,7 +1295,7 @@ def status(webapi, prefix, type):
   for key in set(remote.keys()) - set(local):
     logger.extra('[r] %s/%s (@%s)', TYPE_PLURAL[type], key,
                  remote[key]['creation_date'])
-
+  sys.exit(0)
   return 0, retval