Fix mysql permissions

Closes-Bug: #1489537
Change-Id: I6544398f8cebe2a0d1bec6db2a75a9f8651f5d6f

docker/galera/config-galera.sh

@@ -32,6 +32,5 @@ function bootstrap_db {
 }
 
 function populate_db {
-    mysql_install_db
-    chown -R mysql: /var/lib/mysql
+    mysql_install_db --user=mysql
 }

docker/galera/start.sh

@@ -14,6 +14,8 @@ set_configs
 # loading functions
 source /opt/kolla/config/config-galera.sh
 
+chown mysql: /var/lib/mysql
+
 # This catches all cases of the BOOTSTRAP variable being set, including empty
 if [[ "${!KOLLA_BOOTSTRAP[@]}" ]] && [[ ! -e /var/lib/mysql/cluster.exists ]]; then
     ARGS="--wsrep-new-cluster"