Allow running "overcloud node delete" with heat templates directly

Depends-On: https://review.openstack.org/#/c/202054/
Change-Id: If1013ec981d659c85e96875d54aed270e6fca64e

rdomanager_oscplugin/v1/overcloud_node.py

@@ -19,6 +19,8 @@ from cliff import command
 from openstackclient.common import utils
 from tripleo_common import scale
 
+TRIPLEO_HEAT_TEMPLATES = "/usr/share/openstack-tripleo-heat-templates/"
+
 
 class DeleteNode(command.Command):
     """Delete overcloud nodes."""
@@ -37,18 +39,28 @@ class DeleteNode(command.Command):
                             help='Name or ID of tuskar plan to scale '
                                  '(default=Env: OVERCLOUD_PLAN_NAME)',
                             default=utils.env('OVERCLOUD_PLAN_NAME'))
+        parser.add_argument(
+            '--templates', nargs='?', const=TRIPLEO_HEAT_TEMPLATES,
+            help="The directory containing the Heat templates to deploy"
+        )
+
         return parser
 
     def take_action(self, parsed_args):
         self.log.debug("take_action(%s)" % parsed_args)
-        management = self.app.client_manager.rdomanager_oscplugin.management()
-        orchestration = (self.app.client_manager.rdomanager_oscplugin.
-                         orchestration())
+        osc_plugin = self.app.client_manager.rdomanager_oscplugin
+        if parsed_args.templates:
+            management = None
+        else:
+            management = osc_plugin.management()
+
+        orchestration = osc_plugin.orchestration()
         scale_manager = scale.ScaleManager(
             tuskarclient=management,
             heatclient=orchestration,
             plan_id=parsed_args.plan,
-            stack_id=parsed_args.stack)
+            stack_id=parsed_args.stack,
+            tht_dir=parsed_args.templates)
         print("deleting nodes {0} from stack {1}".format(parsed_args.nodes,
                                                          parsed_args.plan))
         scale_manager.scaledown(parsed_args.nodes)