Issue1022

CPython will define a __module__ attribute at the beginning of a class 
definition based on the __name__ global.
Jython 2.3a0 on java1.5.0_13
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>>> class Foo(object):
... print __module__
... 
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "<stdin>", line 2, in Foo
NameError: name '__module__' is not defined
Python 2.5.1 (r251:54863, Aug 19 2007, 21:02:30) 
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
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>>> class Foo(object):
... print __module__
... 
__main__
>>> 
CPython actually does this in the class's code object, so this is a 
compiler bug:
>>> c = compile("""\
... class Foo(object):
... print __module__
... 
... """, 'foo', 'exec')
>>> c.co_consts[1]
<code object Foo at 0x54d4e8, file "foo", line 1>
>>> dis.dis(c.co_consts[1])
 1 0 LOAD_NAME 0 (__name__)
 3 STORE_NAME 1 (__module__)
 2 6 LOAD_NAME 1 (__module__)
 9 PRINT_ITEM 
 10 PRINT_NEWLINE 
 11 LOAD_LOCALS 
 12 RETURN_VALUE

This is slated to be fixed in the newcompiler.
This is actually the main issue in getting the pure python version of zope 
interface working on Jython: https://bugs.launchpad.net/zope3/+bug/204022 

Fixed in r5215, __module__ is now emitted by the compiler in Module.java
Added test_class_jy.ClassDefinesDunderModule
We also test it in zope.interface