Changing imports to match new location of InstanceCatalogs in catsim 	modified:   generatePhosimInput.py
Changing imports to match new location of InstanceCatalogs in catsim
	modified:   generatePhosimInput.py

LSSTDESC/Twinkles,LSSTDESC/Twinkles,DarkEnergyScienceCollaboration/Twinkles,DarkEnergyScienceCollaboration/Twinkles