appsdk-bump-app-catalog 721 bumping sdk to 2379-d9615b4

sdk commit: RallySoftware/appsdk@60ccab2e4fcc2c64b26d16dbc263ed3225f29ed7
author: Richard Green and Will Beard
message: DE17305: Portfolio Hierarchy View does not refresh automatically

sdk commit: RallySoftware/appsdk@d9615b4cdc69045a4217dfbf443d0ca4de6488a0
author: Richard Green and Will Beard
message: DE17305: Portfolio Hierarchy View does not refresh automatically - Fixed