Hi Sam,
I just pushed the migration proposal patch to ovsdb:
https://git.opendaylight.org/gerrit/#/c/14549/

There are 2 changes you need in order to have this working:
controller https://git.opendaylight.org/gerrit/#/c/14464/
ofplugin https://git.opendaylight.org/gerrit/#/c/14463/

What I would like to ask you to do:

• test ovsdb (from master) distribution/opendaylight-karaf before changing anything (just to be sure - I forgot to do that)
• file an ovsdb bug containing migration info (see BUG-2611) so we can link them and track this (and put it into commit message title)
• the controller and opfplugin changes - just checkout and mvn-clean-install-DskiptTests them locally
• rebuild ovsdb (with -nsu switch) and check if it still works as intended
• hint: karaf command bundle:list | grep 'model' should yeld bundles like this:
  207 | Active | 80 | 1.2.0.SNAPSHOT | org.opendaylight.controller.model.model-inventory
  208 | Active | 80 | 1.2.0.SNAPSHOT | org.opendaylight.controller.model.model-topology
  209 | Active | 80 | 0.1.0.SNAPSHOT | org.opendaylight.openflowplugin.model.model-flow-base
  210 | Active | 80 | 0.1.0.SNAPSHOT | org.opendaylight.openflowplugin.model.model-flow-statistics
  211 | Active | 80 | 0.1.0.SNAPSHOT | org.opendaylight.openflowplugin.model.model-flow-service
  ...
  there should not be org.opendaylight.controller.model.model-flow*

• ask if you have questions
• tell me the result as soon as possible

Migration details (we are a bit off the schedule):
https://lists.opendaylight.org/pipermail/openflowplugin-dev/2015-January/002386.html