fix winbot/py 2.4.4 bug

Originally reported by: agroszer (Bitbucket: agroszer, GitHub: agroszer)

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http://winbot.zope.org/builders/setuptools_master%20py_244_win32/builds/2/steps/test/logs/stdio

ERROR: test_md5 (setuptools.tests.test_packageindex.TestContentCheckers)

Traceback (most recent call last):
File "c:\buildslave\setuptools_master_py_244_win32\build\setuptools\tests\test_packageindex.py", line 150, in test_md5
self.assertEqual(checker.hash.name, 'md5')
AttributeError: name

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/44

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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It appears the hashlib backport doesn't implement the full API of the canonical hashlib module (not supplying the .name attribute). Thanks so much for running these tests on Python 2.4.

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Add compatibility for Python 2.4 when querying the hash name. Fixes #44

Original comment by agroszer (Bitbucket: agroszer, GitHub: agroszer):

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welcome, FYI tests are run as "nightly" did not have the time yet to figure the change poller for hg

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Bitbucket also provides a 'POST' service, which can POST details about commits (and possibly other activity) to the service to trigger a build. If there's an endpoint at winbot.zope.org to consume that API, I'd be happy to have the BB repo trigger a build.

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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I see the test is now passing. I'll release 0.9.6 shortly.

Original comment by dholth (Bitbucket: dholth, GitHub: dholth):

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Set self.hash_name in init rather than using this function or relying on self.hash.name. Needed for pypy 1.9 as well as python 2.4.

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Python 2.4 issue was previously resolved. The PyPy issue was reported in #49.