Create new ocp4 workloads and workload removal process (#480)

* Introduced ocp4-workload-projectreaper-operator

* Added GPTE defaults to Project Reaper
1) Added defaults to the role
2) Added new defaults for GPTE to the ProjectTracker template

* Made instance alternate names plural
1) Added loop in the cloudformation template to create multiple Route53 entries for multiple alternate instance names
2) Added python-boto to the list of installed packages on bastion
3) Changed default instance in default env_vars to handle alt_name as array

* Added new ocp4-workload-idm
This workload installs Identity Manager on bastion and makes necessary DNS entries for the OpenShift cluster to reach it

* Introduced the ability to remove workloads on cluster destroy in ocp4-workshop
Some workloads may create infrastructure that must be removed before the cloudformation stack is deleted
Added the remove infrastructure tasks to the ocp4-workload-idm workload

* Added new workload: ocp4-workload-mysql
This workload installs and configures MariaDB (MySQL) on the bastion.

* debugged remove workloads and fixed with some refactoring of playbooks

* WIP: refactor for PR comments

* Successfully tested mysql workload

* Successfully tested refactor of IdM workload

* Default variable to avoid "not defined"

* Moved archived ipa-server role to the correct location in the source tree

* Fix for PR review: use Ansible fact to retrieve bastion IP address

* Fixed root account setup in mysql workload

* Refactored instance.alt_name to accept an array of names or a single string for backward compatibility

* Added ocp4-workload-mysql instead of just using an infra-workload because it needs to make a DNS entry for the OpenShift cluster to be able to discover its alias name