add script is-local-tcp-port-opened to erp5/buildout.cfg
change instance-mariadb promise to use is-local-tcp-port-opened
md5sum update
XXX add develop to build slapos.toolbox localy
XXX remove slapos.toolbox tag for dev
remove useless comment
erp5 stack: use latest slapos.toolbox (0.41.0)
XXX Revert "erp5 stack: use latest slapos.toolbox (0.41.0)"

This reverts commit 82682b64b6fff4c872ce44e16c06330b8cb4f715.