Add missing metadata app migration.

mayan/apps/metadata/migrations/0007_auto_20150918_0800.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0006_auto_20150820_0616'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='metadatatype',
+            name='parser',
+            field=models.CharField(blank=True, help_text='The parser will reformat the value entered to conform to the expected format.', max_length=64, verbose_name='Parser', choices=[(b'metadata.parsers.DateAndTimeParser', b'metadata.parsers.DateAndTimeParser'), (b'metadata.parsers.DateParser', b'metadata.parsers.DateParser'), (b'metadata.parsers.TimeParser', b'metadata.parsers.TimeParser')]),
+            preserve_default=True,
+        ),
+    ]