Fixes #34010 - add a setup hook to RbacRegistry

RbacRegistry should hold all the information about the Plugin RBAC.
This method will be responsible for initializing in the database in the future.

Fixes #33419 - Introduce Fact Parser Registry

FactParser class has two purposes in current codebase. It acts as parent
for other fact parses (PuppetFactParser, AnsibleFactParser,
RhsmFactParser...) and also as a registry for registering parsers for
given type/key. This PR introduces FactParserRegistry under...

Fixes #21654 - create registry for importers

Fixes #19589 - Added plugin migration generator

Now plugin creators would be able to generate migrations by invoking

``` sh

rails g plugin:migration <migration name and options> --plugin_name=my_plugin

```

Refs #18001 - Avoid role extending from rake tasks permission

Fixes #18001 - Add plugin permissions to core's roles