Update the plugin puppet_url_without_modules

[rnelson0]

The current check looks for the modules endpoint, but users can create and maintain their own endpoints. The plugin should be renamed and check for a valid endpoint name AND a subsequent path of the correct format. Notes from #561:

• puppet:///modules/modulename/file could be tested for with puppet:///modules/\w+/
• puppet:///othermount/file and puppet:///othermount/path/file are both valid and would match ^puppet:///\w+/\w+
• puppet:///modules/filename is not valid and could be tested for with puppet:///modules/\w+$

If that seems reasonable, I will open a new ticket to track that change and link to it in the OP.

[rnelson0]

From February Triage: This is not called out in the style guide and should be disabled and moved to a community plugin. It should be disabled in 3.0.0.

[JonathonAnderson]

+1