Upgrade bazlets to latest stable-2.16 to build with 2.16.8 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.8 API

Change-Id: I6a4b0cc29638f653dfa59d881d92946f5969af1a

GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota