appsdk-bump-app-catalog 662 bumping sdk to 2278-feabab2

sdk commit: RallySoftware/appsdk@feabab20d117c94f574fd82e1a91b90127a5ab7e
author: Dave Thompson and Andrew Ralston
message: S63786: adding 'none' to tags value if there are no tags to display and the user is in read-only mode