XD-1091 XD-1088 stepExecution progress info

- Added REST endpoint to GET StepExecution progress info
 - Added resource assembler support
 - Added tests
- Added shell command to get the progress info
 - Created shell command 'job execution step progress" with
   jobExeuctionId and stepExecutionId being the options
 - Added tests
XD-1091 Fix review comments
Merge

Updated command description