Fix incorrect network name "ctrlplane" to "ctlplane" for SNMPd.
Fix incorrect network name "ctrlplane" to "ctlplane" for SNMPd.

The ServiceNetMap contains an incorrect entry for the SnmpdNetwork.
The entry "ctrlplane" should be "ctlplane".

Change-Id: I6c8ab952e364e8fc643e291388b7f13615a1df3e

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates