fix workflow consistency: check state/transition name uniqness in the wf when state/transition name is modified ; use the new msg argument of rql constraints to have a nicer error message on failure

#!/bin/sh

rm -f web/test/tmpdb*
rm -f web/tali18n.py

rm -f applications/*/test/tmpdb*
rm -f applications/*/tali18n.py
rm -f applications/*/i18n/*_full.po
rm -f applications/*/data/Schema.dot