Change repo_names to forge module repos

Prior to this commit, the rake tasks `job:import and
`job:import_if_sunday` only looked at the puppetlabs repositories
`puppet`, `hiera`, `puppetlabs-stdlib`, and `facter`. This commit makes
it look at a (dynamically generated) list of repositories for puppetlabs
forge modules.
Add regex check for getting repo_names
Add regex check for getting repo_names - for real this time