Add forgeupgrade in order to know when git gc is on

Change-Id: Ia35408a642fd015ff39dfa2d8cac3c38ce845f7d
Refactoring: extract the pid file checking in a dedicated class

Change-Id: I1b8cded0cb49708f1f8561c71189b90023a2c310
Gitolite housekeeping

As root, execute the following command:

    /usr/share/codendi/src/utils/php-launcher.sh /usr/share/codendi/plugins/git/bin/gl-admin-housekeeping.php

Change-Id: I2057f2e64db6e66438048e27e5652d228303e414
Run git gc on SYSTEM_CHECK

Change-Id: Ic9c904b9a10f2157a289affe63c02c04755c3632
Merge remote-tracking branch 'gerrit/5034_have_an_automated_gitolite_housekeeping' into HEAD

* gerrit/5034_have_an_automated_gitolite_housekeeping:
  Run git gc on SYSTEM_CHECK
  Gitolite housekeeping
  Refactoring: extract the pid file checking in a dedicated class
  Add forgeupgrade in order to know when git gc is on

Change-Id: Ia953f1604ee8d31c9670affde9a334ead0beca4b
This is Tuleap 6.5.99.39

Change-Id: I2c17c85191ae05ff7ccf6ac017588edd08f4326f