appsdk-bump-app-catalog 767 bumping sdk to 2452-655d52f

sdk commit: RallySoftware/appsdk@53ce25902617995acd809329b629019b9a1226e8
author: Andrew Grauch and Rick Lansky
message: S68060 - Javascript Framework to Consume Aggregate Models

sdk commit: RallySoftware/appsdk@655d52f6372e29bd99a2cfd244cfb64feea5f888
author: Stefan Kendall and Steven Boles
message: S68173 Improved required field counter performance