Upgrade bazlets to latest stable-2.16 to build with 2.16.4 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.4 API

Change-Id: I4554beaf9e769c0e1dabe767fde5debcdf099f8c

GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project