Ironic: enable iPXE by default and make it configurable
Ironic: enable iPXE by default and make it configurable

Introduce two new options: IronicIPXEEnabled (true by default) and
IronicIPXEPort (8088 by default).

Also copy UEFI configuration from instack-undercloud.

Change-Id: I4e037c1ea9c8663efb4d472469d0d2640e265710
Depends-On: Icb9633134114041bbd497e7652482dd5d34c9327
Partially-Implements: blueprint ironic-integration

trozet/opnfv-tht,trozet/opnfv-tht,trozet/opnfv-tht,dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates