Upgrade bazlets to latest stable-2.16 to build with 2.16.2 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.2 API

Change-Id: I0d6b75ecd18c29a4bf0758536adf7f136e14e89c

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