appsdk-bump-app-catalog 315 bumping sdk to 1570-374371e

sdk commit: RallySoftware/appsdk@9483f61e80a498eecb787f3c804ab25b696f903a
author: Wade Peterson and Neal Enssle
message: S61192 - Added a fix for an Ext bug with index handling and MixedCollections.

sdk commit: RallySoftware/appsdk@97c7503dcd3564d5b99d072cc0bfce61a325b7aa
author: Doug Diehnelt
message: Added filter function to ClientMetricsBuilder