Saml group mapping v2

[Antiksec]

Describe the Pull Request

Rework for SSO mapping:
1) Using list of mapped groups instead of one
2) Exception when SSO logged-in user doesn't have suitable SSO groups
3) Default role for use when SSO logged-in user has no groups

Checklist for PR

• Run MobSF unit tests and lint tox -e lint,test
• Tested Working on Linux, Mac, Windows, and Docker
• Add unit test for any new Web API (Refer: StaticAnalyzer/tests.py)
• Make sure tests are passing on your PR

Additional Comments (if any)

DESCRIBE HERE