tiered rate limit jwt e2e tests

[pdabelf5]

Proposed changes

• small refactor of python test image
• add pyjwt to python test image
• make all nginx variables use underscores rather than hyphens in virtualserver.go
• add tiered rate limit e2e python tests
  • VS level - test_speclevel_rl_policy_tiered_basic_premium_no_default_jwt_claim_sub
  • VS level - test_speclevel_rl_policy_tiered_basic_premium_with_default_jwt_claim_sub
  • VS level - test_routelevel_rl_policy_tiered_basic_premium_with_default_jwt_claim_sub
  • VS level - test_routelevel_rl_policy_tiered_basic_premium_no_default_jwt_claim_sub
  • VS level - test_rl_duplicate_default_policy_tiered_basic_premium_with_default_jwt_claim_sub
  • VSR level - test_rl_policy_jwt_claim_sub_vsr
  • VSR level - test_rl_policy_tiered_basic_premium_no_default_jwt_claim_sub_vsr
  • VSR level - test_rl_policy_tiered_basic_premium_with_default_jwt_claim_sub_vsr
  • VSR level - test_rl_policy_multiple_tiered_jwt_claim_sub_vsr
  • VSR level - test_override_multiple_tiered_jwt_claim_sub_vs_vsr
  • VSR level - test_rl_duplicate_default_policy_tiered_basic_premium_with_default_jwt_claim_sub_vsr

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.74%. Comparing base (9a0a3f7) to head (9703c6c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7412      +/-   ##
==========================================
- Coverage   52.76%   52.74%   -0.02%     
==========================================
  Files          89       89              
  Lines       21267    21267              
==========================================
- Hits        11221    11217       -4     
- Misses       9582     9584       +2     
- Partials      464      466       +2     

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