v2.3.5

Change log:

61d72d3 Upgrade versions; prepare for release
2c91196 GH-1307: Doc Polishing
35caa12 Fix New Sonar Bug and Smell
692713d Introducing MultiRabbit Bootstrap (#1303)
faa7dce Fix PublishCallCh.afterAckCallback race condition
ba4ef38 Log error when direct message listener fails
dc6b74e Fix Remaining Code Smells After SonarQube Upgrade
9ab7d70 Sonar: Fix another Nullable
c7ced03 Sonar: Add Nullable to Possibly Null Parameters
ed93e70 Improve Sonar and Jacoco plugin configurations
5566bf6 GH-1267: Overloaded MPP Method with Exchange/RK