Support integration/development efforts for Jenkins GitLab Plugin
As per our docs:
Since GitLab 9.0, API V4 is the preferred version to be used.
API V3 will be removed in GitLab 9.5, to be released on August 22, 2017.
I believe that we should not break workflows of our customers who depend on Jenkins integration.
Discussion on Slack: https://gitlab.slack.com/archives/C0NFPSFA8/p1498777131968503