Fix compile warnings in EngineHelper
Fix compile warnings in EngineHelper

This fixes one set of compiler warnings, but there are many more in
other targets. This also fixes what appear to be copy-paste bugs.

MSFTOSSMgmt/WPSDSCLinux,MSFTOSSMgmt/WPSDSCLinux,MSFTOSSMgmt/WPSDSCLinux,MSFTOSSMgmt/WPSDSCLinux,MSFTOSSMgmt/WPSDSCLinux,MSFTOSSMgmt/WPSDSCLinux