OVS forward-bpdu setting & other OVS settings through the charm

Hi,

We had one network configuration/cloud deployment where this OVS parameter had to be set:

other_config : forward-bpdu: optional string, either true or false
              Controls forwarding of BPDUs and other network control frames
              when NORMAL action is invoked. When this option is false or
              unset, frames with reserved Ethernet addresses (see table below)
              will not be forwarded. When this option is true, such frames
              will not be treated specially.

In this case we had to set it to 'true' and we did it manually running the command below on each node where OVS had to be set accordingly:

ovs-vsctl set bridge OVS_BRIDGE_NAME other-config:forward-bpdu=true

It would be really helpful to be able to configure this and other OVS parameters directly through the neutron-openvswitch charm

( http://openvswitch.org/support/dist-docs/ovs-vswitchd.conf.db.5.txt )