seta valor padrão para campo doc adm obs

sapl/protocoloadm/migrations/0013_auto_20170320_1637.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.11 on 2017-03-20 16:37
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('protocoloadm', '0012_auto_20170315_1211'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='documentoadministrativo',
+            name='observacao',
+            field=models.TextField(blank=True, default='', verbose_name='Observação'),
+            preserve_default=False,
+        ),
+    ]