Updated logic to handle precedence amongst secret-file and secret values being passed from both source knife and cli.
Updated logic to handle precedence amongst secret-file and secret values being passed from both source knife and cli.

mwrock/knife-windows,MsysTechnologiesllc/knife-windows,ClogenyTechnologies/knife-windows,mwrock/knife-windows,chef/knife-windows,RobbertJanSW/knife-windows,MsysTechnologiesllc/knife-windows,offslinker/knife-windows,ClogenyTechnologies/knife-windows,RobbertJanSW/knife-windows,offslinker/knife-windows,chef/knife-windows