refactor(core): add GitHub to RegisteredSystemns

2 jobs for 2-add-github-impl in 1 minute and 38 seconds (queued for 1 second)
Name Stage Failure
failed
maven:test Test
[ERROR] -> [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/MojoFailureException
Cleaning up file based variables
ERROR: Job failed: exit code 1