Fix Docker build on CentOS
git config breaks when the key already exists, which is
the case in Gerrit v2.16 as the javaOptions already
have a value in the default configuration.
Put an extra --add to make sure the extra option is added
and the config command doesn't fail anymore.
Change-Id: I285ab71bc572126dfb79830bc52cfb73dd04f83b
diff --git a/centos/7/Dockerfile b/centos/7/Dockerfile
index 2971a23..7eab676 100644
--- a/centos/7/Dockerfile
+++ b/centos/7/Dockerfile
@@ -14,7 +14,7 @@
USER gerrit
RUN java -jar /var/gerrit/bin/gerrit.war init --batch --install-all-plugins -d /var/gerrit
RUN java -jar /var/gerrit/bin/gerrit.war reindex -d /var/gerrit
-RUN git config -f /var/gerrit/etc/gerrit.config container.javaOptions "-Djava.security.egd=file:/dev/./urandom"
+RUN git config -f /var/gerrit/etc/gerrit.config --add container.javaOptions "-Djava.security.egd=file:/dev/./urandom"
ENV CANONICAL_WEB_URL=
