Remove old migration and add Django 1.7.x migration to increase lock name field size

mayan/apps/lock_manager/migrations/0002_auto_20150604_2219.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('lock_manager', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='lock',
+            name='name',
+            field=models.CharField(unique=True, max_length=64, verbose_name='Name'),
+            preserve_default=True,
+        ),
+    ]

mayan/apps/lock_manager/south_migrations/0003_auto__chg_field_lock_name.py

@@ -1,30 +0,0 @@
-# -*- coding: utf-8 -*-
-from south.utils import datetime_utils as datetime
-from south.db import db
-from south.v2 import SchemaMigration
-from django.db import models
-
-
-class Migration(SchemaMigration):
-
-    def forwards(self, orm):
-
-        # Changing field 'Lock.name'
-        db.alter_column(u'lock_manager_lock', 'name', self.gf('django.db.models.fields.CharField')(unique=True, max_length=64))
-
-    def backwards(self, orm):
-
-        # Changing field 'Lock.name'
-        db.alter_column(u'lock_manager_lock', 'name', self.gf('django.db.models.fields.CharField')(max_length=48, unique=True))
-
-    models = {
-        u'lock_manager.lock': {
-            'Meta': {'object_name': 'Lock'},
-            'creation_datetime': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
-            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
-            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '64'}),
-            'timeout': ('django.db.models.fields.IntegerField', [], {'default': '30'})
-        }
-    }
-
-    complete_apps = ['lock_manager']