Add the ml2_odl section when using opendalight_v2
Add the ml2_odl section when using opendalight_v2

Add the option to add the section of ml2_odl
to ml2_conf.ini when opendaylight_v2 mechanism driver is used

Change-Id: I2a1c5097614e47cc09e43bbc77305a0548d54baa

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo