Fix services administration create/update issue

Change-Id: I6f6d365779bcf83887ad56d7927a9f3894fca600
Merge commit 'refs/changes/71/2471/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix services administration create/update issue
This is Tuleap 7.0.99.30

Change-Id: I602237a2c1ebcb72e027137bd2bfc75fea99e1b0