Move config options under neutron.ovs

These config options are supposed to be under neutron.ovs (see template
for neutron openvswitch agent). They were mistakenly moved to be just
under neutron when the migration to SoftwareConfig was done.

Change-Id: I5769dc1dc501d48c965f8e4e36238cfcaac64a17
Merge "Move config options under neutron.ovs"