Keycloak add gruops support and French messages

[kazimsarikaya]

The pr consists of two parts

1. Some keycloak users use group membership mapping and add groups field to the response.
2. Error messages are in French. I translate them to the English.

[C0rn3j]

This does not seem to work, tested on Redmine 4.1.0.

Might be a KC misconfiguration on my side, but am not clear as to where.

I get this upon login:

Started GET "/oic/local_login?state=<censored>&session_state=<censored>&code=<censored>" for 10.123.123.11 at 2020-09-23 01:27:47 +0200
Processing by AccountController#oic_local_login as HTML
  Parameters: {"state"=>"f<censored>", "session_state"=>"<censored>", "code"=>"<censored>"}
  Current user: anonymous
Completed 500 Internal Server Error in 227ms (ActiveRecord: 14.0ms)
  
NoMethodError (undefined method `each' for nil:NilClass):
  
plugins/redmine_openid_connect/lib/redmine_openid_connect/account_controller_patch.rb:196:in `update_groups'
plugins/redmine_openid_connect/lib/redmine_openid_connect/account_controller_patch.rb:150:in `oic_local_login'
lib/redmine/sudo_mode.rb:65:in `sudo_mode'
Started GET "/" for 127.0.0.1 at 2020-09-23 01:27:57 +0200
Processing by WelcomeController#index as */*
  Current user: anonymous
Redirected to http://127.0.0.1/login?back_url=http%3A%2F%2F127.0.0.1%2F
Filter chain halted as :check_if_login_required rendered or redirected
Completed 302 Found in 10ms (ActiveRecord: 2.0ms)

[homerpirado]

Efectivamente @C0rn3j a mi tampoco me funciona con la version 4.X ¿Pudiste solucionarlo de alguna manera?