Remove register globals usage on service management

Signed-off-by: Nicolas Terray <nicolas.terray@enalean.com>

Change-Id: I7da909e9b0ef39a9eab015840f13054109bfdf15
Merge commit 'refs/changes/86/386/2' of http://gerrit.tuleap.net/tuleap into stable

* http://gerrit.tuleap.net/tuleap:
  Remove register globals usage on service management