Stop running setup_devel for Ryu

It doesn't work here for various reasons.
- Ryu's setup.py is incompatible with global requirements
- This code is called before install_infra.

Ryu is not a part of OpenStack anyway.

Closes-Bug: 1287569
Change-Id: I01a942411f7d06bdf8f1fec5d1a0bc319560f329
remove distros that are out of support by their upstream

raring EOL was - 27 Jan 2014
f18 EOL was - 14 Jan 2014
opensuse 12.2 was - 15 Jan 2014

if their upstream isn't going to support them, we shouldn't be
in devstack.

this additionally leaves us in an interesting situation that there
is no longer *any* opensuse version listed as supported. if the
opensuse community doesn't step up here we should probably look
at removing it.

Change-Id: Ibb883930b430477dfd3b5126c5db04f95a50d3a7
Merge "Stop running setup_devel for Ryu"
Merge "remove distros that are out of support by their upstream"