added test cases for create new facility feature

[Jaspreet-singh-1032]

Summary

Follow up for #11197

Added python testcases for create new facility feature API.

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Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.16.0b5.dev0_git.321.gc79d0da1.pex
Windows Installer (EXE)	kolibri-0.16.0b5.dev0+git.321.gc79d0da1-unsigned.exe
Debian Package	kolibri_0.16.0b5.dev0+git.321.gc79d0da1-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0b5.dev0+git.321.gc79d0da1-0.3.0.dmg
Android Package (APK)	kolibri-0.16.0b5.dev0+git.321.gc79d0da1-0.1.0-debug.apk
TAR file	kolibri-0.16.0b5.dev0+git.321.gc79d0da1.tar.gz
WHL file	kolibri-0.16.0b5.dev0+git.321.gc79d0da1-py2.py3-none-any.whl

[rtibbles]

Excellent - you can also use the TestCase assert methods, for future reference: https://docs.python.org/3/library/unittest.html#assert-methods

And the extra Django TestCase assertion methods too:
https://docs.djangoproject.com/en/1.11/topics/testing/tools/#assertions

[rtibbles]

Thanks for this follow up @Jaspreet-singh-1032 - very nice to see.

[Jaspreet-singh-1032]

Thanks @rtibbles for these suggestions. I will definitely consider them for future contributions :)