CA-81330: If we need to add default flows to an ovs port, ensure we got a MAC
CA-81330: If we need to add default flows to an ovs port, ensure we got a MAC

Default flows need to be added to an ovs instance whenever the fail mode
changes from standalone to secure. If we don't do that, the DVS controller
won't have access to the vswitch anymore.

Signed-off-by: Rob Hoes <8783b3376fb07d39edffc8d7da68a6de3874a7e6@citrix.com>

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