refresh_monasca_script.sh is useful for
development in a devstack environment.
Enhanced the script to
* start and stop monasca-transform process
running in a screen session
* added more hardening to catch for errors
and exit if any command fails.
* added debugging statements help track
down any errors when the script is run.
Change-Id: Idab02d555eed192d8242c870017955b935532c3d