Create a repo in test REST data builder

This task is part of story #7687 REST endpoint to list project'ss git repositories

Change-Id: I3646c6d79fd44de75b8f3064e1a3a09d7f30906c
Merge commit 'refs/changes/73/3373/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Create a repo in test REST data builder
This is Tuleap 7.8.99.13

Change-Id: Iac9d31c361327663611728029c2ce412d530af3a