update bridge-base
update bridge-base

Pull in the following updates:
DynamoQueryHelper for arbitrary query: PR https://github.com/Sage-Bionetworks/bridge-base/pull/44
Refactor environment variable precedence: PR https://github.com/Sage-Bionetworks/bridge-base/pull/45

DwayneJengSage/BridgePF,DwayneJengSage/BridgePF,alxdarksage/BridgePF,alxdarksage/BridgePF,alxdarksage/BridgePF,Sage-Bionetworks/BridgePF,Sage-Bionetworks/BridgePF,Sage-Bionetworks/BridgePF,DwayneJengSage/BridgePF