Autoadmin: Incorporate the autoadmin app

Incorporate the external django-autoadmin app as a core app
and convert it into a Mayan app. This change adds the new
settings: "COMMON_AUTOADMIN_EMAIL", "AUTOADMIN_PASSWORD", and
"AUTOADMIN_USERNAME".

Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>

mayan/apps/autoadmin/settings.py

@@ -0,0 +1,29 @@
+from __future__ import unicode_literals
+
+from django.utils.translation import ugettext_lazy as _
+
+from mayan.apps.smart_settings import Namespace
+
+from .literals import DEFAULT_EMAIL, DEFAULT_PASSWORD, DEFAULT_USERNAME
+
+namespace = Namespace(name='autoadmin', label=_('Auto administrator'))
+
+setting_email = namespace.add_setting(
+    global_name='AUTOADMIN_EMAIL', default=DEFAULT_EMAIL,
+    help_text=_(
+        'Sets the email of the automatically created super user account.'
+    )
+)
+setting_password = namespace.add_setting(
+    global_name='AUTOADMIN_PASSWORD', default=DEFAULT_PASSWORD,
+    help_text=_(
+        'The password of the automatically created super user account. '
+        'If it is equal to None, the password is randomly generated.'
+    )
+)
+setting_username = namespace.add_setting(
+    global_name='AUTOADMIN_USERNAME', default=DEFAULT_USERNAME,
+    help_text=_(
+        'The username of the automatically created super user account.'
+    )
+)