Docker: Allow init to write HA plugin config file

Before this change, init was unable to write the HA plugin config file
as usual. Handle the latter the same as done already for gerrit.config.

Change-Id: I0d35428cddbe95110eb9590124ea4338b4296360

src/test/docker/docker-compose.yaml

diff --git a/src/test/docker/docker-compose.yaml b/src/test/docker/docker-compose.yaml
index b64d1ba..93971b3 100644
--- a/src/test/docker/docker-compose.yaml
+++ b/src/test/docker/docker-compose.yaml
@@ -27,7 +27,7 @@
       - ./gitvolume:/var/gerrit/git
       - ./shareddir:/var/gerrit/shared/dir
       - ./etc/gerrit.config:/var/gerrit/etc/gerrit.config.orig
-      - ./etc/high-availability.gerrit-01.config:/var/gerrit/etc/high-availability.config
+      - ./etc/high-availability.gerrit-01.config:/var/gerrit/etc/high-availability.config.orig
     environment:
       - HOSTNAME=localhost
 
@@ -46,7 +46,7 @@
       - ./gitvolume:/var/gerrit/git
       - ./shareddir:/var/gerrit/shared/dir
       - ./etc/gerrit.config:/var/gerrit/etc/gerrit.config.orig
-      - ./etc/high-availability.gerrit-01.config:/var/gerrit/etc/high-availability.config
+      - ./etc/high-availability.gerrit-02.config:/var/gerrit/etc/high-availability.config.orig
     environment:
       - HOSTNAME=localhost
       - WAIT_FOR=gerrit-01:8080

src/test/docker/gerrit/start.sh

diff --git a/src/test/docker/gerrit/start.sh b/src/test/docker/gerrit/start.sh
index 454207d..8666485 100755
--- a/src/test/docker/gerrit/start.sh
+++ b/src/test/docker/gerrit/start.sh
@@ -7,7 +7,10 @@
   wait-for-it.sh $WAIT_FOR -t 600 -- echo "$WAIT_FOR is up"
 fi
 
-chown -R gerrit: /var/gerrit && sudo -u gerrit cp /var/gerrit/etc/gerrit.config.orig /var/gerrit/etc/gerrit.config
+chown -R gerrit: /var/gerrit
+
+sudo -u gerrit cp /var/gerrit/etc/gerrit.config.orig /var/gerrit/etc/gerrit.config
+sudo -u gerrit cp /var/gerrit/etc/high-availability.config.orig /var/gerrit/etc/high-availability.config
 
 if [[ ! -f /var/gerrit/git/All-Projects.git/config ]]
 then