Adjust usage of is_ha_environment()

Limit it to just instance count and make sure we use it for the mongo check

awx/main/ha.py

@@ -1,13 +1,6 @@
 # Copyright (c) 2015 Ansible, Inc.
 # All Rights Reserved.
 
-# Python
-import os
-from IPy import IP
-
-# Django
-from django.conf import settings
-
 # AWX
 from awx.main.models import Instance
 
@@ -18,27 +11,4 @@ def is_ha_environment():
     # If there are two or more instances, then we are in an HA environment.
     if Instance.objects.count() > 1:
         return True
-
-    # If the database is not local, then we are in an HA environment.
-    host = settings.DATABASES['default'].get('HOST', 'localhost')
-
-    # Is host special case 'localhost' ?
-    if host is 'localhost':
-        return False
-
-    # Check if host is an absolute file (i.e. named socket)
-    if os.path.isabs(host):
-        return False
-
-    # Is host a LOCAL or REMOTE ip address ?
-    try:
-        if IP(host).iptype() is 'LOOPBACK':
-            return False
-        else:
-            return True
-    except ValueError:
-        pass
-
-    # host may be a domain name like postgres.mycompany.com
-    # Assume HA Environment
-    return True
+    return False