[DISCUSS] Register user jar files in {Stream}ExecutionEnvironment

[50man]

Hi everyone,

I propose an important API feature to register user jar files in 
{Stream}ExecutionEnvironment.

The proposal is here,

https://issues.apache.org/jira/browse/FLINK-14319

Let's discuss it and I hope we can acquire a consent ASAP cause this 
feature is potentially helpful for some release issues about version 
1.10 on sub-task FLINK-14055 
<https://issues.apache.org/jira/browse/FLINK-14055> under task 
FLINK-10232 <https://issues.apache.org/jira/browse/FLINK-10232> ;-).


Best,

Leo