Add monitoring group as a children of baremetal group
Add monitoring group as a children of baremetal group

Add monitoring group as a children of baremetal group in
multinode inventory.

Change-Id: Id4b1239a347637e30759a8e29816aa8f24e5cd53
Closes-Bug: #1648311

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible