QPID-7633: [Java Broker] address review comments

* remove redundant declaration of methods from AbstractAMQPSession
* pass the receiving channels to the Session_1_0 ctor and remove Session_1_0#setReceivingChannel and Session_1_0#setSendingChannel
* get rid of uses of AMQPConnection_1_0Impl in favour of AMQPConnection_1_0
* rename sessionModel to session in various places
* rename channel to session in AbstractQueue
20 files changed