SNTConfigurator: Use NSPropertyListImmutable instead of kCFPropertyListImmutable
SNTConfigurator: Use NSPropertyListImmutable instead of kCFPropertyListImmutable

russellhancox/santa,russellhancox/santa,tburgin/santa,google/santa,google/santa,google/santa,russellhancox/santa,tburgin/santa,tburgin/santa