Merge branch 'stable-3.1' into 'stable-3.2'

* stable-3.1:
  Upgrade bazlets to latest stable-3.1 to build with 3.1.11 API
  Use Gerrit 3.1.11 in Dockerfile

Change-Id: Ie349138079e3240b82b3d7da2ca2ca6450e78f16

src/test/docker/gerrit/Dockerfile

diff --git a/src/test/docker/gerrit/Dockerfile b/src/test/docker/gerrit/Dockerfile
index 4a1dfbb..002ef9c 100644
--- a/src/test/docker/gerrit/Dockerfile
+++ b/src/test/docker/gerrit/Dockerfile
@@ -1,4 +1,4 @@
-FROM gerritcodereview/gerrit:3.1.8
+FROM gerritcodereview/gerrit:3.1.11
 
 ENV GERRIT_BRANCH=stable-3.1