Add meta/argument_specs.yml to that helps in validation, documentation, changelog of a role

[glimchb]

          1. Define defaults for the roles if applicable. the default vars are not mandatory fields that can be changed as part of the role input.

2. Add meta/argument_specs.yml to that helps in validation, documentation, changelog of a role.
3. Add meta/main.yml with the details of the author and other data.
4. Lets add the lint, sanity checks as it becomes hectic to fix it.
5. Role vars, register and fact vars need to follow naming convention that prefix role_name_

Originally posted by @sachin-apa in #2 (comment)