[validation api] properly use yams 0.36 validation error api and update message catalog. Follows bbe0d6985e59 the creation of the `translate` method in the 23a10f049447 yams commit.

#! /bin/sh -e
#

if [ "$1" = remove -o "$1" = upgrade ]; then
  if which install-docs >/dev/null 2>&1; then
    install-docs -r cubicweb-doc
  fi
fi

#DEBHELPER#

exit 0