rather than explicitly use directly Zope node.

erp5_wendelin has nowadays its own catalog table thus we need to explicitly tell to created them during configuration phase.

Add test of this functionality.

be a handy way to expose Wendelin.

Tests passing.

/reviewed-on !31

one (and already used in parts of code) as self.REQUEST.

(legacy code still uses it so remain backward compatible).

This reverts commit 416502dc.

This reverts commit 66882b19.

Wendelin standalone install script uses local slapos proxy introspection to get these and does not any more rely on process introspection.