fix some nonconformity after checkstyle

[ISSUE #2846]fix -E might not port to other systems

* [ISSUE #2732] Fix message loss problem when rebalance with LitePullConsumer

* Fix message loss problem when rebalance with LitePullConsumer, update 2

[ISSUE #2538]Optimize log output when message trace saving fails

[ISSUE #2811] Fix the wrong topic was consumed in the DefaultMessageStoreTest test program

[ISSUE #2816] fix messageArrivingListener NPE

* fix the endpoint cannot get instanceId without http

* fix the endpoint cannot get instanceId without http

* add unit test

* add unit test

* add unit test
Co-authored-by: Npanzhi33 <wb-pz502261@alibaba-inc.com>

Co-authored-by: Nph3636 <tianxingguang@kanzhun.com>

[ISSUE #2801]Fix NamesrvAddr connot set in Producer

Co-authored-by: Nvon gosling <vongosling@apache.org>

[ISSUE #2730]fix Multiple instances in the same application share MQClientInstance

Co-authored-by: NYoung <allen@gmail.com>

Co-authored-by: N张玻 <zhangbo@mydataway.com>

Co-authored-by: Nzhuweilin <zhuweilin@iie.ac.cn>

Co-authored-by: Nzhangxu16 <zhangxu16@xiaomi.com>

[ISSUE #2647] Fix classloader conflict in client-module test case.

Co-authored-by: Njjz921024 <470622352@qq.com>

[ISSUE #2449]  fix: resetOffset simultaneously will cause each message consume more than once

Update concept.md