OpenShift 3.6 on AWS (#619)

* addition of glusterfs

* using existing instance groups

* allowing the ability to specify amount of app nodes

* better template due to ashcrow

* addition of 7.4 ami

* inclusion of brownfield

* teardown update

* linting

* higher required disk space

* require docker package before install now

* temporary variable location...will remove due to origin

* now can do pipelining at default

* testing priv escalation timeout fix

* transitioning to rhel_subscribe role

* roll back of use of rhel_subscribe

* addition of repos

* linting and missing reo

* rolling back

* use of overlay2

* need to code cloudformation for atomic but replace if required

* moving origin release to provider space

* installation params

* new add node steps

* linting

* rollback of rhel_subscribe