install: premium cartridges

With oo-admin-yum-validator ready, enable the commands to use the
node-fuse and node-amq components, the corresponding RHN channels, and
corresponding yum repositories for internal use (refactoring a bit).
install: update 2.1 => 2.2

Update the remaining references to 2.1 (in subscription-mgmt areas we
can't really test until release) to 2.2.
Merge pull request #479 from sosiouxme/2.2-install-premium-carts

2.2 install premium carts