-> Changed specific pieces that are recommended to be changed in Ansible
2.7 and higher (such as using fail_msg and success_msg, not just msg for
assertions
-> Improved the getkeytab adhoc playbook for flexibility and delegations
against a IPA server, as well as forcing the choice of the user with
permissions that can perform the action rather than the default "admin"
user in FreeIPA as a security fix.
In this push, we are making a decent amount of updates to the gitlab
playbooks as well as updating the README. See below for the changes:
* README updated for further clarity
* GitLab role with further reconfiguration for group lookups
* GitLab role with further reconfiguration to disable built-in nginx
* nginx configuration added and provided to work with omnibus
* GitLab variables updated
