[Satellite 6.3]Satellite upgrade failed with ImportError.

Issue

• Satellite upgrade failed with error cannot import name UnrewindableBodyError
• Satellite upgrade failed with error cannot import name DependencyWarning
  • May be preceded by /usr/lib/python2.7/site-packages/requests/__init__.py:80: RequestsDependencyWarning: urllib3 (1.10.2) or chardet (3.0.4) doesn't match a supported version!
  • May be proceeded by su - apache -s /bin/bash -c pulp-manage-db failed! Check the output for error!