provisioner aws_dns role is tied to create_login_page

SUMMARY

this code for aws_dns https://github.com/ansible/workshops/blob/master/provisioner/provision_lab.yml#L107-L116 makes dependency on another role aws_workshop_login_page. we should not have a dependency on the other role

ISSUE TYPE

Bug Report

EXTRA VARS FILE

create_login_page: false
# when towerinstall is on, this will license it with provided license
autolicense: true
# this will install Ansible Tower on all control nodes
towerinstall: true

e.g. here is an example of an extra vars file we are looking for:

$ cat ~/Github/linklight/provisioner/seans_workshop.yml
---
ec2_region: us-east-1
ec2_name_prefix: seantest
student_total: 25
admin_password: ansible
create_login_page: true

ANSIBLE VERSION

2.8.x

CONFIGURATION

n/a

OS / ENVIRONMENT

n/a

TOWER

n/a

PLAYBOOK SHORT OUTPUT

n/a

PLAYBOOK LONG OUTPUT

n/a

ansible / workshops

provisioner aws_dns role is tied to create_login_page #394