GitLab CI: Using "Group Variables" instead of "Project Variables"

[Mihai Nita]

Expand the Variables sections under https://gitlab.com/okapiframework/okapi/settings/ci_cd and https://gitlab.com/okapiframework/xliff-toolkit/settings/ci_cd

They have a lot in common, so they can all be shared with the whole group, section Variables under https://gitlab.com/groups/okapiframewok

That means all projects (Okapi, Xliff Toolkit, Integration, Reports, maybe running with Java 8 / 11) will use the same variables.

And this is harder to syn otherwise, because it is all GitLab UI, not files that can be shared, like the stuff in ci/gitlab

[Denis Konovalyenko]

@nmihai_2000 , I totally agree with the idea of sharing all common secret variables under the group. This should be an easy thing, though we need to be careful while transferring.

[ysavourel]

+1

[Mihai Nita]

Done, checked that it works