Adjusted django_manage integration test files to reduce ignore lines in sanity tests (#1805)

tests/integration/targets/django_manage/files/base_test/1045-single-app-project/single_app_project/manage.py

@@ -1,12 +1,18 @@
-#! /usr/bin/env python3
+#!/usr/bin/env python
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
 # single_app_project/manage.py
 import os
 import sys
 
+
 def main():
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'single_app_project.core.settings')
     from django.core.management import execute_from_command_line
     execute_from_command_line(sys.argv)
 
+
 if __name__ == '__main__':
     main()

tests/integration/targets/django_manage/files/base_test/simple_project/p1/manage.py

@@ -1,4 +1,8 @@
 #!/usr/bin/env python
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
 """Django's command-line utility for administrative tasks."""
 import os
 import sys

tests/integration/targets/django_manage/files/base_test/simple_project/p1/p1/settings.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
 """
 Django settings for p1 project.
 

tests/integration/targets/django_manage/files/base_test/simple_project/p1/p1/urls.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
 """p1 URL Configuration
 
 The `urlpatterns` list routes URLs to views. For more information please see: