[baremetal] MaaS: Fix DHCP dynamic reserved range

[baremetal] MaaS: Fix DHCP dynamic reserved range

- patch MaaS to default to `DHCP` instead of `AUTO` for physical
  PXE interfaces (all IPs will be handed out by MaaS DHCP *inside* the
  defined dynamic DHCP IP range);
- reduce range to silence bogus MaaS warning about address exhaustion;
- regenerate pod_config.yml.example to reflect the changes;
- drop `opnfv_infra_maas_pxe_address` (duplicate of
  `opnfv_infra_maas_node01_deploy_address`);
- add `opnfv_infra_config_pxe_address` for future usage;
- while at it, fix missing patch copyright;

JIRA: FUEL-316

Change-Id: I81fad333e77f7c8508cd2b2b267c7b39c130e3e1
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>