Add register form based on erp5_credential bt5.
Create Credential Requst at server side.

/reviewed-on nexedi/wendelin!32

in some project this is required.
Remove obsolete script.

Traceback:

2019-06-18 10:29:39,329 ERROR Application Couldn't install Wendelin
Traceback (most recent call last):
  File "/srv/slapgrid/slappart17/srv/runner/software/48eba2a3dea7ea09294d0e4a58407c09/eggs/Zope2-2.13.29-py2.7.egg/OFS/Application.py", line 660, in install_product
    global_dict, global_dict, silly)
  File "/srv/slapgrid/slappart17/srv/runner/software/48eba2a3dea7ea09294d0e4a58407c09/parts/wendelin/product/Wendelin/__init__.py", line 72, in <module>
    allow_type(pd.DataFrame)
  File "/srv/slapgrid/slappart17/srv/runner/software/48eba2a3dea7ea09294d0e4a58407c09/eggs/AccessControl-2.13.16-py2.7-linux-x86_64.egg/AccessControl/SimpleObjectPolicies.py", line 89, in allow_type
    raise ValueError, "%s handles its own security" % `Type`
ValueError: <class 'pandas.core.frame.DataFrame'> handles its own security

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 nexedi/wendelin!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.