Merge branch 'testci' into 'master'

Add .gitlab-ci.yml

See merge request !1
3 jobs for master in 2 minutes and 6 seconds (queued for 2 seconds)
Status Name Job ID Coverage
passed build #12737


passed deploy #12739


failed test #12738


Name Stage Failure
test Test There is an unknown failure, please try again
[ERROR] Please refer to /builds/xt9634/ProofScriptParser/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[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] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]
ERROR: Job failed: exit code 1