Update Gerrit plugins and deployment.

Change-Id: I36dbb7bed9100c2574a5f91caaed8bf23c326840
diff --git a/gerrit/gerrit-k8s.yaml b/gerrit/gerrit-k8s.yaml
index 92d5966..28341e9 100644
--- a/gerrit/gerrit-k8s.yaml
+++ b/gerrit/gerrit-k8s.yaml
@@ -111,7 +111,7 @@
             defaultMode: 0444
       #initContainers:
       #  - name: reindex
-      #    image: docker.benkard.de/mulk/gerrit:3.4.1-4
+      #    image: docker.benkard.de/mulk/gerrit:3.7.1-1
       #    command:
       #      - java
       #      - -jar
@@ -119,6 +119,8 @@
       #      - reindex
       #      - -d
       #      - /var/gerrit
+      ##      - --index
+      ##      - changes
       #    env:
       #      - name: _JAVA_OPTIONS
       #        value: -Xmx300m -XX:MaxMetaspaceSize=150m -XX:+CMSClassUnloadingEnabled -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true -XX:+UnlockExperimentalVMOptions -XX:+UseSerialGC -XX:+UseCompressedOops -XX:+AlwaysPreTouch -XX:+ScavengeBeforeFullGC -XX:+DisableExplicitGC
@@ -141,11 +143,11 @@
       #        subPath: gerrit.config
       containers:
         - name: master
-          image: docker.benkard.de/mulk/gerrit:3.4.1-2
+          image: docker.benkard.de/mulk/gerrit:3.7.1-1
 
           # for running `init`:
           #
-          #   java -jar /var/gerrit/bin/gerrit.war init -d /var/gerrit
+          #   kubectl exec -ti deploy/gerrit -- java -jar /var/gerrit/bin/gerrit.war init -d /var/gerrit
           #
           # or the H2 console:
           #