Restore proxy test cases

Author: MarcialRosales

deps/rabbitmq_auth_backend_oauth2/test/rabbit_oauth2_provider_SUITE.erl

@@ -69,9 +69,9 @@ verify_provider() -> [
     ,{oauth_provider_with_proxy, [], [
         get_oauth_provider_has_proxy
     ]}
-%    ,{oauth_provider_with_https_proxy, [], [
-%        get_oauth_provider_has_https_proxy
-%    ]}
+    ,{oauth_provider_with_https_proxy, [], [
+        get_oauth_provider_has_https_proxy
+    ]}
 ].
 
 init_per_suite(Config) ->