Merge reflect-deprecate-6689: Remove deprecated classes from
twisted.python.reflect.

Author: multani
Reviewer: thijs, exarkun
Fixes: #6689
Refs: #5929

Accessor, AccessorType, OriginalAccessor, PropertyAccessor,
Settable and Summer in twisted.python.reflect, deprecated
since Twisted 12.1.0, are now removed.


git-svn-id: svn://svn.twistedmatrix.com/svn/Twisted/trunk@40032 bbbe8e31-12d6-0310-92fd-ac37d47ddeeb
Revert r40032: Merge reflect-deprecate-6689: Remove deprecated classes from twisted.python.reflect. 

Failing tests because the Version import was removed mistakenly.

[ERROR]
Traceback (most recent call last):
  File "/twisted/test/test_reflect.py", line 202, in test_accumulateBases
    (Version("Twisted", 11, 0, 0), "inspect.getmro"),
exceptions.NameError: global name 'Version' is not defined

twisted.test.test_reflect.DeprecationTestCase.test_accumulateBases
===============================================================================

Reopens: #6689


git-svn-id: svn://svn.twistedmatrix.com/svn/Twisted/trunk@40034 bbbe8e31-12d6-0310-92fd-ac37d47ddeeb
Re-merge reflect-deprecate-6689: Remove deprecated classes from twisted.python.reflect.

Author: multani
Reviewer: thijs, exarkun, hawkowl
Fixes: #6689
Refs: #5929

Accessor, AccessorType, OriginalAccessor, PropertyAccessor, Settable and Summer
in twisted.python.reflect, deprecated since Twisted 12.1.0, are now removed. 


git-svn-id: svn://svn.twistedmatrix.com/svn/Twisted/trunk@40041 bbbe8e31-12d6-0310-92fd-ac37d47ddeeb
Remove deprecated objects from twisted.python.reflect
Port twisted.python.reflect to Python 3
Merged partially ported _reflectpy3 modules back  into there original modules
Move fullyQualifiedName back from t.p.deprecate to t.p.reflect
Fix class name reflection tests on Python 3
... and move back fullyQualifiedName to .deprecate, because reflect needs deprecate