Use "neutron_api" as the backend name

"neutron_api" is used instead of "neutron-api" as the backend name in the
haproxy configuration. Ideally, we should not rely on names defined in the user
configuration, but we have no solution for this right now.

Change-Id: I55be0555f04b820b1a2dec3cd453632db0bdcd9d
1 file changed