Ensure Open vSwitch can be installed on RHEL6.

 * RHEL6 does not include Open vSwitch in the default repos, but it
   is available via the RDO repo.  This patch automatically
   configures the RDO repo for RHEL6.
 * The openvswitch package is now listed as an rpm dependency to
   ensure it can be cached by a pre-built CI environment.

Change-Id: I8f93f53039cca4ff29bcb91720be7bb047b3ed8a
Create usable IPC directory for ZeroMQ

By default, the zeromq driver looks for
/var/run/openstack which needs to be created and
given the right permissions.

It is easier and just as safe in the case of devstack
to just use mktemp to establish a temporary working
directory.

Change-Id: I4cec33e49d2b042a244420fb40d83d476e4971cd
ZeroMQ driver to default to redis matchmaker

Switching to the redis matchmaker.

The localhost matchmaker does not presently work.
Also, the localhost matchmaker could not work for
multi-host setups.

Change-Id: I81a26b9af78328e360a18b87371c619e194365d2
Install nose 1.1 from EPEL for RHEL.

 * It's not possible to prevent python-nose (which is not compatible
   with Tempest) from being installed since so many os packages
   dependent on it.
 * This patch installs python-nose1.1 from EPEL and adds a
   /usr/local/bin symlink for nosetests1.1 so that invocations for
   Tempest will work as expected.

Change-Id: I756d1ca5eda127dcdd2efb047c8e14dd344f710d
Add h-api to suggested ENABLED_SERVICES for Heat

Currently lib/heat says:

    To enable, add the following to localrc
    ENABLED_SERVICES+=,heat,h-api-cfn,h-api-cw,h-eng

Once the stack is up, `heat list` fails because the API server
isn't running.

This commit adds h-api to that list.
Also make sure h-api is killed in stop_heat().

Change-Id: I2e818bb343680b3778f9277c23c766f784d28887
Merge "Install nose 1.1 from EPEL for RHEL."
Merge "Add h-api to suggested ENABLED_SERVICES for Heat"
Merge "Create usable IPC directory for ZeroMQ"
Merge "ZeroMQ driver to default to redis matchmaker"
Merge "Ensure Open vSwitch can be installed on RHEL6."
Merge branch 'master' of github.com:openstack-dev/devstack