"./python Lib/test/regrtest.py test_zipimport_support" pass, but not with the -R option.

----
$ ./python Lib/test/regrtest.py -R 3:3: test_zipimport_support
[1/1] test_zipimport_support
beginning 6 repetitions
123456
test test_zipimport_support failed -- Traceback (most recent call last):
  File "/home/haypo/prog/SVN/py3k/Lib/test/test_zipimport_support.py", line 96, in test_inspect_getsource_issue4223
    self.assertEqual(inspect.getsource(zip_pkg.foo), test_src)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 693, in getsource
    lines, lnum = getsourcelines(object)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 682, in getsourcelines
    lines, lnum = findsource(object)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 530, in findsource
    raise IOError('could not get source code')
IOError: could not get source code

1 test failed:
    test_zipimport_support
----

My fix for the issues with reloading of the _ssl module meant that a couple of temporary modules weren't getting cleared out of sys.modules properly, thus confusing the second and later runs of affected tests.

Attached patch adds explicit removal calls for the affected modules.

Helps to add the patch rather than the whole file...

Fixed for 3.2 in r88368 (no backport needed, since the older test suites didn't exhibit the original problem with the _ssl module reloading)

(Georg reviewed the patch after I mentioned it to him on IRC)