appsdk-bump-app-catalog 222 bumping sdk to 1268-c8cc4a2

sdk commit: RallySoftware/appsdk@e525e6d4de2ea85d27eb05c8473cfbaaf37ad844
author: Neeraj Khadakkar and Mike Rampson
message: S60401: RPB. Add ability to override _ref creation for RPB.

sdk commit: RallySoftware/appsdk@c1a2e1027afabb199648d32ec472c1ff7ebdb0cf
author: Stefan Kendall
message: S60023 Implemented view portion of web link.

sdk commit: RallySoftware/appsdk@bbb2736497d50142cdc22133e20eb6e5eb96a516
author: Steve Neely and Kevin Roberts
message: DE19648 I don't see any ranks in the rank column

sdk commit: RallySoftware/appsdk@685bd9ab76682d9198340345e0be80ba7bd5c36c
author: Alan Brockett and Kyle Morse
message: DE19628: Unable to tab nav on Kanban column settings field grid

sdk commit: RallySoftware/appsdk@c8cc4a20750d71c090d78676dcb3cf72b0b51076
author: Matt Parrish
message: upgrading webdriver to 2.39.0