SolverTool, as a Type Provider, needs to be handled carefully:
Nicolas Dumazet authored
in fact, accessing erp5.portal_types will try loading the contents
of portal_solvers as well...


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41375 20353a03-c40f-0410-a6d1-a30d3c3de9de
4c5e632f