appsdk-bump-app-catalog 316 bumping sdk to 1573-31f76bd

sdk commit: RallySoftware/appsdk@2f0d3dca2a287c717db96c5ea5339634b876e394
author: Erika Brice
message: DE20054: Filter blank slate is shown even when there is no filter

sdk commit: RallySoftware/appsdk@606a99df734337af992ab18f337cd216c5e93a69
author: Matt Greer
message: upgrade rallymetrics to 0.2.2

sdk commit: RallySoftware/appsdk@31f76bd33acea1b88b9c64cbd769a539c872eb3c
author: Matt Greer
message: Fixing syntax error in NoDataSpec