Fix tempest setup

The tempest setup script has a bad set of tests for the module path.
This changes to work with both rpm names.

Change-Id: I27cfa7db88a303ec3be0d2b8dd97c190c3cafc95
packstack: rdo-release update

Updates to how rdo-release is installed and baseurl updated.
Use the same basic layout as linux w/ rhel,fedora etc.

Change-Id: I46b3780aefd4cae1fa748664403a3c6d7f9b7409
linux-common: ntp moved out of linux-common

ntp is now setup via role dependency, this was redundant

Change-Id: I693802fcc33d95265974c018fdc977295a414dc5
packstack: remove call to workaround

A call to a workaround was merged in by mistake

Change-Id: Ieb8fdfdec17d1d26aa8660d6541fbbfffedc8c86