appsdk-bump-app-catalog 792 bumping sdk to 2505-4766355

sdk commit: RallySoftware/appsdk@8f2792202761069f270b3b2c9bb17e988f6687aa
author: Jeff Ellis
message: S68837: Add tests to make sure create button gets enabled if there are no missing required fields at creation
appsdk-bump-app-catalog 793 bumping sdk to 2506-d504844

sdk commit: RallySoftware/appsdk@7911b53e6a4ebfee7e2af36b91b46f67910a4eae
author: Matt Parrish, Kevin Roberts and Will Klein
message: S67999: Consistent-ify TestCase gear menu items. Make sure they all have same items.
DE21294: Successors column is not displaying on IterStatus Grid View