add banneduser middleware

[filariow]

Supersedes #1079

Linked to codeready-toolchain/registration-service#455 and codeready-toolchain/toolchain-e2e#1045

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[MatousJobanek]

Looks good, but I made it a bit simpler in #1084
but feel free to merge it and I'll take care of the conflicts in my PR

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alexeykazakov, filariow, MatousJobanek, mfrancisc

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[MatousJobanek]

Ok, I was faster, so let's close this PR as the reg-service should have "full view" permissions for the whole Toolchain API group

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.07%. Comparing base (7e3ae3b) to head (2764c5a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1083   +/-   ##
=======================================
  Coverage   85.07%   85.07%           
=======================================
  Files          55       55           
  Lines        5038     5038           
=======================================
  Hits         4286     4286           
  Misses        581      581           
  Partials      171      171