RPM Support

The yum importer docs[0] for the 'skip' values state:

List of content types to be skipped during the repository synchronization. If unspecified, all types will be synchronized. Valid values are: rpm, drpm, distribution, errata, packagegroup; default is [].

There are at least two problems here:

1. 'errata' doesn't validate. Instead it needs to be 'erratum'.
2. Also 'packagegroup' can't be used at all.

It should be determined what the valid values are of 'skip', that they all work, and that the correct names pass validation and incorrect names don't. I'm not sure if validation is happening on client-side, server-side, or both.

[0]: http://pulp-rpm.readthedocs.org/en/latest/tech-reference/yum-plugins.html#yum-importer