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
Fix inverted conditionals in setup_develop

This fixes regressions introduced by:
    Change-Id: Ic97e68348f46245b271567893b447fcedbd7bd6e
    ("Handle non-zero exit code from git diff")

Change-Id: I053a292c287f3035eef37db2264eda06a170f9bc
Closes-Bug: 1287513
Merge "Fix inverted conditionals in setup_develop"
put libvirt debug behind a flag

only turn on the libvirt debugging if we really need it, which
we could control in the gate via devstack-gate.

Change-Id: I5e6d41d5333357608ab6a614610c060400f70a10
Install script for One Convergence Neutron plugin.

Change-Id: I1dcc625a7c986e7533820b01af9eee5b8addcffe
Implements: install for blueprint oc-nvsd-neutron-plugin
Merge "put libvirt debug behind a flag"
Merge "Stop running setup_devel for Ryu"
Merge "remove distros that are out of support by their upstream"
Merge "Install script for One Convergence Neutron plugin."
Merge branch 'master' of https://github.com/openstack-dev/devstack