Fix SLA #4710 : remove mysql connexion error through viewvc

* Modify include.py to take in account the mysql custom port if exists

Change-Id: Ic78798462a435ba69fa7dbb1379779cbd92056dd
Merge commit 'refs/changes/82/782/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix SLA #4710 : remove mysql connexion error through viewvc

Change-Id: Ia5aa62c6a34ca3179db8949e17e84aa8f4205ee6
This is Tuleap 6.3.99.13

Change-Id: I38109beb124b634e1bb9685b85e778bd97ff646a