Add a cypress test.

[dvkruchinin]

Motivation and context

Adding a simple test to run via cypress.

How has this been tested?

Manual testing

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) 2020 Intel Corporation
#
# SPDX-License-Identifier: MIT

[coveralls]

Pull Request Test Coverage Report for Build 6600

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 64.968%

---

Files with Coverage Reduction	New Missed Lines	%
cvat/apps/engine/media_extractors.py	2	76.99%

Totals
Change from base Build 6575:	0.02%
Covered Lines:	11086
Relevant Lines:	16658

---

💛 - Coveralls

[nmanovic]

@dvkruchinin , let's use another directory for the test: /tests/cypress/integration (without ui subdirectory). In general it is E2E testing. See https://docs.cypress.io/guides/core-concepts/writing-and-organizing-tests.html.

Also let's rename the filename: /tests/cypress/integration/auth_page.js

[dvkruchinin]

@dvkruchinin , let's use another directory for the test: /tests/cypress/integration (without ui subdirectory). In general it is E2E testing. See https://docs.cypress.io/guides/core-concepts/writing-and-organizing-tests.html.

Also let's rename the filename: /tests/cypress/integration/auth_page.js

Done. Renamed the file and changed its location.