Add options to get production logs from all sub directories

Add following 2 options to dirac-ilc-get-prod-log.py,

-A --All : Get logs from all sub-directories

-N --NoPrompt : No prompt before download

These are useful for ILD to download production job log files.

BEGINRELEASENOTES

*ILCTransformationSystem

NEW: dirac-ilc-get-prod-logs new options to get all files in a folder (-A) and to automatically start downloading without confirmation (-N)

ENDRELEASENOTES