Repair travis CI execute failed issue

(1) Polish message trace target channel (2) Fix the issue that consume message with namespace trace cannot found

 [RIP-10] Add test cases for QueryConsumeTimeSpanBody.java

* update: the period to a comma

* Update Concept.md

* Update Concept.md

Polish message trace default trace topic implementation

[ISSUE #1164]Fix Consumer Instance can't consume message from slave when cluster is in the high level tps and master has been killed. (#1181)

* [issue#1164]return the codes to original reput method part.

* [issue#1164]fix issue that Consumer Instance can't consume message from slave when cluster is in the high level tps and master has been killed.

* [issue#1164]if the broker is a master node,then modify reputFromOffset correctly.

* [issue#1164]add some coding comments.

[issue#1164]Consumer Instance can't consume message from slave when the TPS of cluster is in the high level and master has been killed.