Merge branch 'release_3.1.3' into devel

* release_3.1.3: (52 commits)
  ack fact scan messages
  making ldap user/group search fields into codemirror instances
  removing UI parsing for LDAP User and Group Search fields
  Allow exception view to accept all valid HTTP methods.
  Restore ability of parsing extra_vars string for provisioning callback.
  Fix up backup/restore role broken in f7a8e45809758322d9ee41c5305850dd70ed5faf
  Stop / start ansible-tower-service during restores
  value_to_python should encode lookup fields as ascii
  fix brace interpolation on standard out pane
  Adjust some hardcoded usages of 'awx' to use 'aw_user' and 'aw_group'.
  Pull Spanish updates from Zanata
  Temporarily grant awx user createdb role
  Stop giving ownership of backups to postgres
  don't display chunked lines'
  Add dropdown li truncation with ellipsis
  CTiT -> adhoc modules should allow the user to add new modules
  Remove task that was replacing the supervisor systemd tmp file
  Fix failing supervisorctl commands on RH-based distros
  Give ownership of the supervisor socket to awx
  Setting for external log emissions cert verification
  ...

awx/main/migrations/0037_v313_instance_version.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0036_v311_insights'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='instance',
+            name='version',
+            field=models.CharField(max_length=24, blank=True),
+        ),
+    ]