Fix TestAuthenticationProviderService/TestInvalidOAuthAuthorizationCode test failure

[xcoulon]

"escape" the error message which is returned in the query param of the redirect URL

Signed-off-by: Xavier Coulon xcoulon@redhat.com

[codecov[bot]]

Codecov Report

Merging #816 into master will increase coverage by 0.06%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #816      +/-   ##
==========================================
+ Coverage   78.44%   78.51%   +0.06%     
==========================================
  Files          92       92              
  Lines        8964     8964              
==========================================
+ Hits         7032     7038       +6     
- Misses       1410     1413       +3     
+ Partials      522      513       -9

Impacted Files	Coverage Δ
...rovider/service/authentication_provider_service.go	72.22% <ø> (+11.11%)	:arrow_up:

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[xcoulon]

thanks @alexeykazakov !