Upgrade bazlets to latest stable-2.16 to build with 2.16.6 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.6 API

Change-Id: I4014810f4b2fb0054173d64f22d696c5d88d7887

GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota