fix lint tests

3 jobs for master in 3 minutes and 51 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed build #18800

00:01:01

failed deploy #18802
allowed to fail

00:01:09

passed test #18801

00:01:40

 
Name Stage Failure
failed
deploy Test There is an unknown failure, please try again
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :lang
ERROR: Job failed: exit code 1