Install RDO while building packages

We're not interested in maintaining all of the non openstack
dependency packages, for these we can rely on RDO.

Change-Id: I08be7eefa9e7160649e6a79dabbda2e4372b2727
Get version for last line output from setup.py

I some cases setup.py outputs a warning before the version,
to avoid it being read as the version we only look at the
last line output.

Change-Id: Ia887ac96dc2012a61f2db946fd41711c876cefca