Merge remote-tracking branch 'upstream/0.5.0' into branch-0.5.0-yk

Former-commit-id: 59d6f1ffdd4ac892edfe9d9cdfdecf728d0eea6f

CHANGELOG.md

@@ -26,6 +26,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-653 - When config check fail, Milvus close without message
 - MS-654 - Describe index timeout when building index
 - MS-658 - Fix SQ8 Hybrid can't search
+- \#20 - C++ sdk example get grpc error 
 - \#23 - Add unittest to improve code coverage
 
 ## Improvement
@@ -191,8 +192,6 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-570 - Add prometheus docker-compose file
 - MS-576 - Scheduler refactor
 - MS-592 - Change showtables stream transport to unary
-- /#23 - Add unittest to improve code coverage
-sfasdas
 
 ## New Feature
 - MS-343 - Implement ResourceMgr