updates/new code for SiStrip Noise handling for PreMixing
Final Changes for SiStrip noise treatment
Merged 70X_Premixing_SiStrip_noise_fix from repository mdhildreth
fix compile problem
Merge pull request #3069 from mdhildreth/70X_Premixing_SiStrip_noise_fix

70 x premixing si strip noise fix