We cannot support running OVS on both the host and in the hypervisor
snap, this creates a race between both switches, deleting and
re-creating bridges in a loop.
Closes-Bug: #2119532
Change-Id: I793c702be188c8ac5dec37eb29d4d9448c054532
Signed-off-by: Guillaume Boutry <guillaume.boutry@canonical.com>