Fix: ml2-plugin workaround

Change-Id: Id5dea765374858c35d80e536e77ed4a022c6eacb
yum update: add option setting for executing yum update

* Althogh it is best practice to update the node prior to
an install, sometimes the updates are broken.  Add option to skip
yum update based on a setting

Change-Id: I66761843a1dd1f5b3159c0d4dfcaac54740e50d1
remarking out yum update no longer required

Change-Id: I512b57787a1a21cc9004da3bbd3931a620dff3a4
Ensure that foreman and puppet repos are enabled for foreman

Change-Id: I0703103e281ecf915f0dbae35fcefff2e7ab809e
Remove foreman-plugins from enabled repo list

Change-Id: I5c019119f93ced8ad7c99dff2ee2b15d521b6999