appsdk-bump-app-catalog 120 bumping sdk to 897-64c7da2

sdk commit: 78ab37520fc0696939adf410840a70c336fe4782
author: Matt Parrish
message: Fixing promise-based matchers, since they can't be async. This is step 1, to not break dependent tests. Removing the matchers is step 2.

sdk commit: 9fb699a75eb054d95ca678eb5b4087c45f734729
author: Matt Parrish
message: Moving StubPromiseFunctionHelper.coffee out of the matchers directory