Use new ODL diagstatus heath check REST URL
Use new ODL diagstatus heath check REST URL

OpenDaylight's Infrautils project has a new, recommended method for
checking when ODL is up and ready. Use this new diagstatus ODL NB REST
API endpoint vs the old netvirt:1 endpoint.

ODL Jira that tracked adding diagstatus REST API:

https://jira.opendaylight.org/browse/INFRAUTILS-33

RH BZ tracking moving to diagstatus:

https://bugzilla.redhat.com/show_bug.cgi?id=1642270

Change-Id: I44dc5ba7680a9c5db2d6070e813d9b0e31d6e811
Signed-off-by: Daniel Farrell <65eaad88897e615d9128b5e890b98414aac720cc@redhat.com>

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