Rename 'upstream_php5*' keys to 'php5*' in 'nginx'

For nginx server configuration, keys with 'php5*' namespace will be used
to configure the PHP5 template. Also, some formatting issues in PHP5
nginx server template are fixed.
Add 'acl' package to list of base packages

Thanks to this, Ansible should be able to modify file attributes
everywhere, which will be used for better web directories security, for
example.
Changed default nginx redirect code to 307

Previous status code (301 Moved Permanently) could be troublesome to
use due to browsers caching the URL. New code (307 Temporary Redirect)
should fix the problem. You can also define your own redirect code with
'item.redirect_code' option in nginx server template.
Switch GitLab roles to use 'ruby' role dependency

GitLab, GitLab CI and GitLab CI Runner roles will use 'ruby' role as
a dependency, which will by default install Ruby 2.1.
Merge pull request #125 from drybjed/bugfixes

Small bugfixes in several roles