[GitHub] [trafficcontrol] ocket8888 opened a new pull request #3901: Fixed runtime panic when creating roles, added docs

[GitBox <gi...@apache.org>]

ocket8888 opened a new pull request #3901: Fixed runtime panic when creating roles, added docs
URL: https://github.com/apache/trafficcontrol/pull/3901
 
 
   ## What does this PR (Pull Request) do?
   - [x] This PR fixes #3891
   
   
   ## Which Traffic Control components are affected by this PR?
   - Documentation
   - Traffic Ops
   
   ## What is the best way to verify this PR?
   Verify existing tests pass. Build and run Traffic Ops/DB/Portal (CDN-in-a-Box recommended) and verify that admin users can create roles of privilege levels less than or equal to 30 (admin's privilege level) successfully, and no erroneous error message is reported. Build and read the documentation to ensure that it is accurate, comprehensible, and free of guideline violations and/or spelling/grammar mistakes.
   
   ## If this is a bug fix, what versions of Traffic Control are affected?
   
   - master (c18d535)
   - 3.0.1
   - 3.0.2 (RC2)
   - 3.1.0 (pre-release candidate)
   
   ## The following criteria are ALL met by this PR
   
   - [x] This PR adds no additional tests, but tests for the endpoint already exist
   - [x] This PR includes documentation
   - [x] An update to CHANGELOG.md is not necessary
   - [x] This PR includes any and all required license headers
   - [x] This PR does not include a database migration
   - [x] This PR **DOES NOT FIX A SERIOUS SECURITY VULNERABILITY**

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