adds hotfix fo wordpress upgrade

hotfixes/2015-04-26-upgrade-wordpress.sh

+docker pull indiepaas/wordpress
+
+cd /data/domains
+for domain in `ls .`
+do
+  if cat $domain/.env|grep APPLICATION=wordpress
+  then
+    systemctl restart web@$domain
+    /opt/bin/docker-enter $domain wp --allow-root core update-db --path=/app
+  fi
+done