feat(account_app): separate account app to run on dedicated node
- Copied user_reg_cloud role to new account_app role for isolation
- Retained essential tasks for account app deployment and setup
- Removed tasks and files tied to OpenOnDemand (OOD) and Apache as they
do not run on the account app node
user-reg_conf.j2, user-reg_conf_shib.j2 and user_auth_py.j2
- Updated hosts and added acctapp.yaml to define account app hosts inventory
- Added logging to account_app role tasks