Initial Database Configuration bootstrap

* Settings manifest, mapping internal settings to what can be used in
  the database along with type information etc.
* Initial Database model
* Helper object that overlays database settings on django settings

awx/main/conf.py

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+# Copyright (c) 2015 Ansible, Inc..
+# All Rights Reserved.
+
+import json
+from django.conf import settings as django_settings
+from awx.main.models.configuration import TowerSettings
+
+class TowerSettings(object):
+
+    def __getattr__(self, key):
+        ts = TowerSettings.objects.filter(key=name)
+        if not ts.exists:
+            return getattr(django_settings, key)
+        ts = ts[0]
+        if ts.value_type == 'json':
+            converted_type = json.loads(ts.value)
+        elif ts.value_type == 'password':
+            converted_type = ts.value
+        elif ts.value_type == 'list':
+            converted_type = [x.strip() for x in a.split(',')]
+        else:
+            t = getattr(__builtin__, ts.value_type)
+            converted_type = t(ts.value)
+        return converted_type
+
+    def create(key, value):
+        settings_manifest = django_settings.TOWER_SETTINGS_MANIFEST
+        if key not in settings_manifest:
+            raise AttributeError("Tower Setting with key '{0}' does not exist".format(key))
+        settings_entry = settings_manifest[key]
+        setting_actual = TowerSettings.objects.filter(key=key)
+        if not settings_actual.exists():
+            settings_actual = TowerSettings(key=key,
+                                            description=settings_entry['description'],
+                                            category=settings_entry['category'],
+                                            value=value,
+                                            value_type=settings_entry['type'])
+        else:
+            settings_actual['value'] = value
+        settings_actual.save()

awx/main/models/configuration.py

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+# Copyright (c) 2015 Ansible, Inc.
+# All Rights Reserved.
+
+# Python
+
+# Django
+from django.conf import settings
+from django.db import models
+
+# Tower
+from awx.main.models.base import CreatedModifiedModel
+
+class TowerSettings(CreatedModifiedModel):
+
+    SETTINGS_TYPE_CHOICES = [
+        ('string', "String"),
+        ('int', 'Integer'),
+        ('float', 'Decimal'),
+        ('json', 'JSON'),
+        ('password', 'Password'),
+        ('list', 'List')
+    ]
+
+    key = models.CharField(
+        max_length=255,
+        unique=True
+    )
+    description = models.TextField()
+    category = models.CharField(max_length=128)
+    value = models.TextField()
+    value_type = models.CharField(
+        max_length=12,
+        choices=SETTINGS_TYPE_CHOICES
+    )
+    user = models.ForeignKey(
+        'auth.User',
+        related_name='settings',
+        default=None,
+        null=True,
+        editable=False,
+    )
+