Python C++ class wrappers in cppyy do not report the proper name (preventing pickling)

Trying to pickle classes from cppyy we are getting an error (see GAUDI-1197).

It looks like the problem is that asking a class it's fully qualified python name does not give back the correct result:

>>> import cppyy

>>> cppyy.gbl.TH1D

<class 'cppyy.TH1D'>

>>> cppyy.gbl.TH1D.__name__

'TH1D'

>>> cppyy.gbl.TH1D.__module__

'cppyy'

while from a working (pure Python) example we have:

>>> import xml.dom.minidom

>>> xml.dom.minidom.Node

<class xml.dom.minidom.Node at 0x7fa93f33ee88>

>>> xml.dom.minidom.Node.__name__

'Node'

>>> xml.dom.minidom.Node.__module__

'xml.dom.minidom'

Note that if we replace cppyy with ROOT works for an example without namespace.