appsdk-bump-app-catalog 448 bumping sdk to 1928-128552d

sdk commit: RallySoftware/appsdk@c796c9ccd635e12fc1766dabecd35c123a5d6a01
author: Dave Thompson
message: Disabling Popover spec in Chrome.

sdk commit: RallySoftware/appsdk@9c3e76f61185ff537b91fbcbb2cc0227f3c787b8
author: Dave Thompson
message: Revert "Disabling Popover spec in Chrome."

sdk commit: RallySoftware/appsdk@128552d768c845683fe7ad24c6ae4d0576cd575c
author: Dave Thompson
message: Deflakifying PopoverSpec.