Display description from the NodeStatusUve when service is in
initializing state so that user can figure out the reason when
using contrail-status. Changed process info library and pysandesh
to set the appropriate description when a process's state is
non functional.
Closes-Bug: #1381631

Change-Id: Ie6f3ae68e243982d5f1387dfd405cc5de4b5f8b9