implement SshPublicKey model, manager and tests

- implement osusers.models.SshPublicKey and osusers.models.SshPublicKeyManager
- fix broken osusers.models.tests.test_models
- add new test classes SshPublicKeyManagerTest and SshPublicKeyTest
- add migration for SshPublicKey model

gnuviechadmin/osusers/migrations/0005_auto_20150131_2009.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import django.utils.timezone
+import model_utils.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('osusers', '0004_auto_20150104_1751'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SshPublicKey',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('created', model_utils.fields.AutoCreatedField(default=django.utils.timezone.now, verbose_name='created', editable=False)),
+                ('modified', model_utils.fields.AutoLastModifiedField(default=django.utils.timezone.now, verbose_name='modified', editable=False)),
+                ('algorithm', models.CharField(max_length=20, verbose_name='Algorithm')),
+                ('data', models.TextField(help_text='Base64 encoded key bytes', verbose_name='Key bytes')),
+                ('comment', models.TextField(verbose_name='Comment', blank=True)),
+                ('user', models.ForeignKey(verbose_name='User', to='osusers.User')),
+            ],
+            options={
+                'verbose_name': 'SSH public key',
+                'verbose_name_plural': 'SSH public keys',
+            },
+            bases=(models.Model,),
+        ),
+        migrations.AlterUniqueTogether(
+            name='sshpublickey',
+            unique_together=set([('user', 'algorithm', 'data')]),
+        ),
+    ]