correct behavior for travis flag

tools/run_tests/run_tests.py

@@ -462,7 +462,8 @@ argp.add_argument('-x', '--xml_report', default=None, type=str,
         help='Generates a JUnit-compatible XML report')
 args = argp.parse_args()
 
-if args.use_docker and not args.travis:
+if args.use_docker:
+  if not args.travis:
     print 'Seen --use_docker flag, will run tests under docker.'
     print
     print 'IMPORTANT: The changes you are testing need to be locally committed'