Fix issue pylint "No module named 'django' "

[dvkruchinin]

Motivation and context

Resolve the error
ModuleNotFoundError: No module named 'django'
when running static code analysis via pylint.

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

[coveralls]

Coverage increased (+0.02%) to 71.035% when pulling 8c2fe89 on dvkruchinin:dkru/pylint-issue-no-module-named-django into cd3db10 on openvinotoolkit:develop.