On startup, the agent removes and readds flows to the OVS bridges. If an RPC setup error exits the process prematurely, this can leave the bridges in an unsafe state. It is better to set the RPC communication up before making changes to the host system. Closes-Bug: 1217980 Change-Id: Ib9bbb864b9129bb7b1376a150a37a0c07908d74b Signed-off-by: Stephen Gran <stephen.gran@guardian.co.uk>