fix CI issue

1 job for master in 1 minute and 21 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
failed build #32141

00:01:21

 
Name Stage Failure
failed
build Test
[ERROR] Failed to execute goal on project gapIt: Could not resolve dependencies for project lu.list:gapIt:jar:0.9.4: Failed to collect dependencies at junit:junit:jar:4.12: Failed to read artifact descriptor for junit:junit:jar:4.12: Could not transfer artifact junit:junit:pom:4.12 from/to central (http://repo1.maven.org/maven2): Transfer failed for http://repo1.maven.org/maven2/junit/junit/4.12/junit-4.12.pom 501 HTTPS Required -> [Help 1]
[ERROR]
[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/DependencyResolutionException
Uploading artifacts for failed job
ERROR: Job failed: exit code 1