replace nova endpoint
replace nova endpoint

The default is publicURL in novaclient.
This also caused the failure of
gate-watcher-dsvm-multinode-ubuntu-xenial-nv.

Change-Id: I485dd62fb7199ffeca29a9b573a624bf144484d1
Closes-Bug: #1686298
Closes-Bug: #1686281

stackforge/watcher,openstack/watcher,openstack/watcher,stackforge/watcher