Test Suite Iteration 2

[dlopezvsr]

Description

This PR includes:

• djlint added to CI pipeline to validate formatting of django templates. This command is executed under "Run linting" job.
• Leverage of Factories - unittests were updated to use factories created for profiles and blogs (BlogIndexPageFactory, BlogPageFactory, and ProfileFactory) instead of creating pages directly from the model.
• Tests cases were updated and in some of them simplified.
• "Run Unittests" Job was added to CI pipeline to run tests on every commit.
• __init__.py file added inside tests folder of each app for correct initialization.

Related PRs/issues: https://mozilla-hub.atlassian.net/browse/TP1-1615

Tests

• Pull this branch TP1-1615-test-suite-2-django-formatting inside of your prototype repository.
• Run python3 manage.py test .
• Make sure all test passed.
• Also confirm you can properly execute djlint . --check and djlint . --reformat
• Validate "Run Unittests" Job was properly triggered inside this PR.

┆Issue is synchronized with this Jira Story