Style: Prepend "operation_" to data migrations

Prepend "operation_" to the data migration functions
for clear purpose. Add keyword arguments to the RunPython
migration opration.

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

mayan/apps/ocr/migrations/0003_auto_20150617_0401.py

@@ -4,7 +4,7 @@ from __future__ import unicode_literals
 from django.db import migrations
 
 
-def move_content_from_documents_to_ocr_app(apps, schema_editor):
+def operation_move_content_from_documents_to_ocr_app(apps, schema_editor):
     DocumentPage = apps.get_model('documents', 'DocumentPage')
     DocumentPageContent = apps.get_model('ocr', 'DocumentPageContent')
 
@@ -22,5 +22,5 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-        migrations.RunPython(move_content_from_documents_to_ocr_app),
+        migrations.RunPython(code=operation_move_content_from_documents_to_ocr_app),
     ]

mayan/apps/ocr/migrations/0004_documenttypesettings.py

@@ -4,7 +4,7 @@ from __future__ import unicode_literals
 from django.db import models, migrations
 
 
-def create_ocr_setting_for_existing_document_types(apps, schema_editor):
+def operation_create_ocr_setting_for_existing_document_types(apps, schema_editor):
     DocumentType = apps.get_model('documents', 'DocumentType')
     DocumentTypeSettings = apps.get_model('ocr', 'DocumentTypeSettings')
 
@@ -55,5 +55,5 @@ class Migration(migrations.Migration):
             },
             bases=(models.Model,),
         ),
-        migrations.RunPython(create_ocr_setting_for_existing_document_types),
+        migrations.RunPython(code=operation_create_ocr_setting_for_existing_document_types),
     ]