Minor fixes on ctx map protocol field

Author: LoisSotoLopez

deps/rabbit/src/rabbit_amqp_session.erl

@@ -476,7 +476,7 @@ init({ReaderPid, WriterPid, ChannelNum, MaxFrameSize, User, Vhost, ContainerId,
                            max_incoming_window = MaxIncomingWindow,
                            max_link_credit = MaxLinkCredit,
                            max_queue_credit = MaxQueueCredit,
-                           msg_interceptor_ctx = #{protocol => amqp,
+                           msg_interceptor_ctx = #{protocol => ?PROTOCOL,
                                                    username => User#user.username,
                                                    vhost => Vhost,
                                                    conn_name => ConnName}

deps/rabbit/src/rabbit_message_interceptor.erl

@@ -3,7 +3,7 @@
 -export([intercept/3,
          set_msg_annotation/4]).
 
--type protocol() :: amqp091 | amqp | mqtt310 | mqtt311 | mqtt50.
+-type protocol() :: amqp091 | amqp10 | mqtt310 | mqtt311 | mqtt50.
 
 -type msg_interceptor_ctx() :: #{protocol := protocol(),
                                  vhost := binary(),

deps/rabbitmq_mqtt/src/rabbit_mqtt_processor.erl

@@ -2616,7 +2616,7 @@ build_msg_interceptor_ctx(#state{cfg = #cfg{client_id = ClientId,
                                             proto_ver = ProtoVer
                                            },
                                  auth_state = #auth_state{user = #user{username = Username}}}) ->
-    #{protocol => proto_integer_to_atom(ProtoVer),
+    #{protocol => ProtoVer,
       username => Username,
       vhost => VHost,
       conn_name => ConnName,