appsdk-bump-app-catalog 226 bumping sdk to 1287-e6c0fcb

sdk commit: RallySoftware/appsdk@e6c0fcb8b1aa37b5864cb327e5cf86d888e1eac5
author: Alan Brockett and Kyle Morse
message: DE19674: Cardboard should not need to refresh all the columns on an objectDestroy