Update bazlets to latest revision on stable-2.14
Update bazlets to latest revision on stable-2.14

Update bazlets to use GWT version 2.8.2 corresponding to the version
used in core Gerrit since 2.14.6.

Change-Id: I18253a33c0d36b88d5fa00c7b6e4eb087a1f44b3

GerritCodeReview/plugins_reviewers,GerritCodeReview/plugins_reviewers,GerritCodeReview/plugins_reviewers