refactor: Great refactor of redirects

...pp/src/main/resources/localization/messages_cs.properties

...pp/src/main/resources/localization/messages_en.properties

...-oidc-server-webapp/src/main/webapp/WEB-INF/views/aup.jsp

...-webapp/src/main/webapp/WEB-INF/views/test_rp_warning.jsp

...ver-webapp/src/main/webapp/WEB-INF/views/unauthorized.jsp

...in/webapp/WEB-INF/views/unauthorized_ensure_vo_member.jsp

...F/views/unauthorized_ensure_vo_member_notify_redirect.jsp

...rc/main/webapp/WEB-INF/views/unauthorized_is_eligible.jsp

...in/webapp/WEB-INF/views/unauthorized_not_in_env_units.jsp

...p/WEB-INF/views/unauthorized_register_choose_vo_group.jsp

...NF/views/unauthorized_register_notify_action_required.jsp

...ebapp/src/main/webapp/WEB-INF/views/unauthorized_spec.jsp

...idc-server-webapp/src/main/webapp/WEB-INF/web-context.xml

...app/resources/js/unauthorized_register_choose_vo_group.js

...server/src/main/java/cz/muni/ics/oidc/PerunConstants.java

...-server/src/main/java/cz/muni/ics/oidc/RedirectUtils.java

...cz/muni/ics/oidc/server/adapters/PerunAdapterMethods.java

...muni/ics/oidc/server/adapters/PerunAdapterMethodsRpc.java

.../muni/ics/oidc/server/adapters/impl/PerunAdapterImpl.java

.../muni/ics/oidc/server/adapters/impl/PerunAdapterLdap.java