Prevent exception when monitor_instances_for_user runs with a user that may not exist. 	modified:   service/tasks/allocation.py
Prevent exception when monitor_instances_for_user runs with a user that may not exist.
	modified:   service/tasks/allocation.py

CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend