Update Apache for GitLab Rail App in a subdirectory.

M  apache/env.conf.tpl:
  Use a non-conventional Directory root, with a gitlab symlink to public.
A  gitlab/gitlab
  Symlink to 'github/public'
Add gitlab.user and gitolite.group.

M gitlab/gitlab.yml.tpl:
  Add 2 new settings in order to be able to check/add
  gitlab.user to gitolite.group