The 'ovn-transport-zones' configuration allows CMS to set
different transport zones for each chassis defining. This allows
ovn-controller to avoid establishing tunnels to sites where there
might not be L2 connectivity.
This patch is allowing such configuration.
Change-Id: I9bfe308757a8113cdf27693b683bf21199411499
Signed-off-by: Daniel Alvarez <dalvarez@redhat.com>