Add RH-family support

This PR consists of two commits but the first has already featured a previous PR and when that is merged, then this one will only amount to the second commit.
I’m basically telling you that this patch adds support for centos, and that’s what I’ve put in.
I don’t see that I need to all prior problems the cookbook had.
The metadata.rb didn’t even had a name attribute, which reflects the poor quality of the existing cookbook. 
BTW I added the name attribute.

If you feel like my contribution does not meet the quality standard of this cookbook, feel free to not merge it.