test: Remove custom gerrit start script

We can move the necessary parts into the Dockerfile itself.

Change-Id: I1eae55f5e270f25cecbc9b9c72db9d05a8489892

test/docker/gerrit/Dockerfile

diff --git a/test/docker/gerrit/Dockerfile b/test/docker/gerrit/Dockerfile
index dd42d7f..b826394 100755
--- a/test/docker/gerrit/Dockerfile
+++ b/test/docker/gerrit/Dockerfile
@@ -1,13 +1,17 @@
 FROM gerritcodereview/gerrit:3.5.0.1-ubuntu20
 
 ENV GERRIT_SITE /var/gerrit
-COPY artifacts/plugins/ $GERRIT_SITE/plugins/
+RUN rm -rf "$GERRIT_SITE/plugins" && mkdir "$GERRIT_SITE/plugins"
+RUN git config -f "$GERRIT_SITE/etc/gerrit.config" auth.type \
+    DEVELOPMENT_BECOME_ANY_ACCOUNT
+RUN git config -f "$GERRIT_SITE/etc/gerrit.config" \
+    sendemail.enable "false"
+RUN git config -f "$GERRIT_SITE/etc/gerrit.config" \
+    "operator-alias.change.independson" "in_depends-on"
+RUN git config -f "$GERRIT_SITE/etc/gerrit.config" \
+    "operator-alias.change.hasdependson" "has_depends-on"
 
-USER root
-
-COPY artifacts/bin/ /tmp/
-COPY start.sh /
-RUN { [ -e /tmp/gerrit.war ] && cp /tmp/gerrit.war "$GERRIT_SITE/bin/gerrit.war" ; } || true
-
-USER gerrit
-ENTRYPOINT /start.sh
+COPY artifacts /tmp/
+RUN cp /tmp/plugins/* "$GERRIT_SITE/plugins/"
+RUN { [ -e /tmp/bin/gerrit.war ] && cp /tmp/bin/gerrit.war "$GERRIT_SITE/bin/gerrit.war" ; } || true
+RUN chmod 777 "$GERRIT_SITE/git"

test/docker/gerrit/start.sh

diff --git a/test/docker/gerrit/start.sh b/test/docker/gerrit/start.sh
deleted file mode 100755
index cf48b39..0000000
--- a/test/docker/gerrit/start.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-
-git config -f "$GERRIT_SITE/etc/gerrit.config" \
-    operator-alias.change.independson "in_depends-on"
-git config -f "$GERRIT_SITE/etc/gerrit.config" \
-    operator-alias.change.hasdependson "has_depends-on"
-git config -f "$GERRIT_SITE/etc/gerrit.config" \
-    sendemail.enable "false"
-
-echo "Initializing Gerrit site ..."
-java -jar "$GERRIT_SITE/bin/gerrit.war" init -d "$GERRIT_SITE" --batch
-
-echo "Running Gerrit ..."
-exec "$GERRIT_SITE"/bin/gerrit.sh run