reclass: Drop MaaS public IP and interface

reclass: Drop MaaS public IP and interface

MaaS node does not need to be exposed to the public network; instead
the management IP should be enough to access the MaaS dashboard.

So, drop 'infra_maas_node01_external_address' reclass param, together
with its OPNFV PDF param, 'opnfv_infra_maas_node01_external_address'.

This allows us to move compute public IPs back to .{2,3} instead of
.{101,102}, where we moved them during 'pod_config.yml' addition.

While at it, fix a minor duplicate 'name' param for 'br-mgmt' bridge
on kvm nodes.

Change-Id: Ie9fcf5924d7aa37b666f42c968687d73b51a8278
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>