This adds the relevant templates to enable novajoin in a containerized
undercloud environment. Note that this is not meant for the overcloud
(yet), and since there are several limitations that need to be addressed
first. This is meant for the containerized undercloud.
Depends-On: Iea461f66b8f4e3b01a0498e566a2c3684144df80
Depends-On: Ia733b436d5ebd0710253c070ec47a655036e0751
Depends-On: I554125fd6b48e620370f9e3a6061bbdc1d55b0ae
Change-Id: I3aad8a90816e6fc443f20579f6ac7ad4f35eafcb