Resolve #3409491 "Gitlab"

Closes #3409491

added 7 commits

• e4fe8675...9405be2e - 3 commits from branch project:3.0.x
• 6db4dccd - added gitlabci option
• 41f57126 - no commit when on gitlab
• 21083e8e - ensure all files committed
• 2c1f1be1 - only error if gitlabci and core branch provided because others have defaults

Compare with previous version

merged