Updating the setup playbook to support instance group installation

* Support instance groups that begin with "rampart_" and automatically
  group those using celery and data models
* Update settings file to appropriately consider instance groups after
  install and to properly route messages

awx/main/management/commands/register_queue.py

@@ -0,0 +1,39 @@
+# Copyright (c) 2017 Ansible Tower by Red Hat
+# All Rights Reserved.
+import sys
+
+from awx.main.models import Instance, InstanceGroup
+
+from optparse import make_option
+from django.core.management.base import BaseCommand
+
+
+class Command(BaseCommand):
+
+    option_list = BaseCommand.option_list + (
+        make_option('--queuename', dest='queuename', type='string',
+                    help='Queue to create/update'),
+        make_option('--hostnames', dest='hostnames', type='string',
+                    help='List of hosts to add to the queue'),
+    )
+
+    def handle(self, **options):
+        ig = InstanceGroup.objects.filter(name=options.get('queuename'))
+        if ig.exists():
+            print("Instance Group already registered {}".format(ig[0]))
+            ig = ig[0]
+        else:
+            print("Creating instance group {}".format(options.get('queuename')))
+            ig = InstanceGroup(name=options.get('queuename'))
+            ig.save()
+        instance_list = [x.strip() for x in options.get('hostnames').split(",")]
+        for inst_name in instance_list:
+            instance = Instance.objects.filter(hostname=inst_name)
+            if instance.exists() and instance not in ig.instances:
+                ig.instances.add(instance)
+                print("Added instance {} to {}".format(instance, ig))
+            elif not instance.exists():
+                print("Instance does not exist: {}".format(instance))
+                sys.exit(1)
+            else:
+                print("Instance already registered {}".format(instance))