Move gitlab profile out to its own 'profile' module

Prior to this commit, there was a gitlab profile in the site dir
of this control-repo.

After this commit, the profile has been moved to it's own repo
where it can be used more generally and not tightly coupled to this
repository.

As a result, the gitlab role has been removed from this repository
as well.

Author: npwalker

Puppetfile

@@ -44,3 +44,7 @@ mod 'pltraining-rbac',
 mod 'rampup_profile_puppetmaster',
   :git    => 'https://github.com/PuppetLabs-RampUpProgram/RampUp_profile_puppetmaster',
   :branch => 'master'
+
+mod 'rampup_profile_gitlab',
+  :git    => 'https://github.com/PuppetLabs-RampUpProgram/RampUp_profile_gitlab',
+  :branch => 'master'