Gracefully shut down the original container

With keeping the container running, we see SELinux error messages and
sudden crash of the PostgreSQL container. Let's properly shut down the
container before using its volume privately mounted into a different
container.

Background:
podman's :Z modificator for volumes works the way that the latest
container run with the same volume directory mounted with :Z modificator
has access, the previous containers are kept running, but access to the
shared directory is suddenly removed. That caused the first instance of
PostgreSQL server to crash with SIGSEGV actually, while triggering some
SELinux error message during that.

test/run_test

@@ -634,6 +634,13 @@ $volume_options
 
   echo "  Changing passwords"
 
+  echo "Kill the previous container and create a new one"
+  local cidfile=$CID_FILE_DIR/"${name}"
+  docker kill $(cat $cidfile)
+  docker rm -f $(cat $cidfile)
+  # Don't forget to remove its .cid file
+  rm $cidfile
+
   DOCKER_ARGS="
 -e POSTGRESQL_DATABASE=${database}
 -e POSTGRESQL_USER=${user}