QS template fails to create the APSStack when you select MySql because the version is hardcoded

Summary

Linked to git issue:
https://github.com/aws-quickstart/quickstart-alfresco-process-services/issues/17

QS template fails to create the APSStack when you select MySql in the Ohio region because the version is hardcoded.

Looking at the stack failure it shows:

this is in the template:
https://github.com/aws-quickstart/quickstart-alfresco-process-services/blob/master/templates/aps.template

Expected Behavior

• Version should be selectable on template for the Database type being used

Actual Behavior

• Version is hardcoded and is not actually available

Additional Notes
The versions should not be hardcoded for DB versions.
In this case the template was used to startup stack in Ohio.

That version is not available in any region:
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_MySQL.html#MySQL.Concepts.VersionMgmt