Documents: Add missing migration for model rename

Add the migration for the DocumentPageResult model rename in
commit 2d4a710999.

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

mayan/apps/documents/migrations/0049_auto_20181211_0011.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2018-12-11 00:11
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('documents', '0048_auto_20181204_1835'),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name='DocumentPageResult',
+        ),
+        migrations.CreateModel(
+            name='DocumentPageSearchResult',
+            fields=[
+            ],
+            options={
+                'ordering': ('document_version__document', 'page_number'),
+                'verbose_name': 'Document page',
+                'proxy': True,
+                'verbose_name_plural': 'Document pages',
+                'indexes': [],
+            },
+            bases=('documents.documentpage',),
+        ),
+    ]