Upgrade bazlets to latest stable-2.16
Upgrade bazlets to latest stable-2.16

To use the now mandatory https protocol for MAVEN_CENTRAL.

Bug: Issue 12170
Change-Id: I628fb5c979423782df3d752199742d59b3073bec

GerritCodeReview/plugins_admin-console,GerritCodeReview/plugins_admin-console,GerritCodeReview/plugins_admin-console