Schema validator for user_variables.yml

[Ian Cordasco]

When updating or creating user_variables.yml files, there's enough content that mistakes can be made and then cryptic exceptions like http://paste.openstack.org/show/156178/ returned to the user. It might be a good idea to use JSON Schema to give users a way to validate the user_variables.yml file and detect errors before attempting to run the playbook.

I'm happy to take care of this if it's something we actually want to include.

[Ian Cordasco (icordasc)]

https://github.com/sigmavirus24/schema-validator is a proof that this is entirely possible with two schema in the tree for rpc_user_config.yml and user_variables.yml. Let me know what you think.

[Jesse Pretorius (jesse-pretorius)]

As this is a considerable body of work, I'll target it for 11.2.0. If it's ready beforehand it can be retargeted.