Add Null Handling for FunctionToInvoke in StreamBridge along with Test#3079

olegz merged 1 commit intospring-cloud:mainspring-cloud/spring-cloud-stream:mainfrom

StevenPG:bugfix/handle-null-result-on-function-invocation-streambridgeStevenPG/spring-cloud-stream:bugfix/handle-null-result-on-function-invocation-streambridgeCopy head branch name to clipboard