appsdk-bump-app-catalog 765 bumping sdk to 2448-747255f

sdk commit: RallySoftware/appsdk@fb1d8829ed90675acf1a1d806aa2ad3a53cb6f88
author: mrampson
message: S68302: Added nexus:verify to publishSdkArtifact.sh

sdk commit: RallySoftware/appsdk@17b80a8c1cc2b9d83afb803073f80afd80137ac6
author: Doug Alcouffe and Rick Lansky
message: GridEditing is still flaky in Chrome so not running for now and will create a defect to look further

sdk commit: RallySoftware/appsdk@442a680150a71da328765b099c960e76f162d988
author: Jeff Ellis and Rob West
message: S67315: Consolidate EDP view code into the appsdk [hack-a-thon]

sdk commit: RallySoftware/appsdk@747255fa0934d84d251663158a6558aa5b25e36b
author: Jeff Ellis and Rob West
message: Revert "S67315: Consolidate EDP view code into the appsdk [hack-a-thon]"