yum resource should support all configurable yum repo settings

[haidangwa]

Detailed Description

Currently, the yum.repo resource supports only a handful of possible yum configuration properties. This is a very limited short list of properties to check. Can we support all of the configurable properties in a yum repo configuration file?

Context

I found that username and password are not supported by the inspec yum.repo resource, but these are both valid configuration items in a yum configuration stanza.

     ×  YumRepo chef-stable username 
     undefined method `username' for #<Inspec::Resources::YumRepo:0x00007f962179e258>
     ×  YumRepo chef-stable password 
     undefined method `password' for #<Inspec::Resources::YumRepo:0x00007f962179e258>

For yum repositories that require authentication credentials, I need to be able to test this with inspec.

Possible Implementation

[Schwad]

Thanks for filing this issue @haidangwa !

I wonder if a PR to this affect could just add these here on the Yum resource?

https://github.com/inspec/inspec/blob/7bf8e9b6e58836809906224ff1b1d24648db731a/lib/inspec/resources/yum.rb#L142-L156

[stale[bot]]

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