Apply Let's Encrypt Certificates to local IdentityManager (#507)

* 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

* WIP: issue 484 - make nexus deployment optional

* WIP: Change operator container image version and location

* Successfully tested mysql workload

* Successfully tested refactor of IdM workload

* WIP: issue 484 - make nexus deployment optional

* WIP: Change operator container image version and location

* 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

* Updates to nexus operator workload
1) Moved location of nexus-operator container to gpte-devops-automation
2) Added additional permissions needed by nexus-operator
3) Added logic to create a user.info display of the Nexus admin password

* 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

* WIP: Refactor lets encrypt to make more reusable

* Added Lets Encrypt certs to local IdM server

* Bump version of Nexus operator to 0.9.0

* Changed Nexus operator version to 0.9

* WIP: issue 484 - make nexus deployment optional

* WIP: Change operator container image version and location

* Updates to nexus operator workload
1) Moved location of nexus-operator container to gpte-devops-automation
2) Added additional permissions needed by nexus-operator
3) Added logic to create a user.info display of the Nexus admin password

* WIP: Refactor lets encrypt to make more reusable

* Added Lets Encrypt certs to local IdM server

* Bump version of Nexus operator to 0.9.0

* Changed Nexus operator version to 0.9