Test failure on Windows when crypt or passlib is not installed

[Ryan J Ollos]

On 1.0-stable:

(pve) C:\Users\Ryan Ollos\Documents\Workspace\Trac\trac-1.0-stable>python trac/w
eb/tests/auth.py
SKIP: fine-grained permission tests (ConfigObj not installed)
.............Warning: cannot parse password for user "crypt" without the "crypt"
 module
FWarning: cannot parse password for user "crypt" without the "crypt" module
.Warning: cannot parse password for user "crypt" without the "crypt" module
.
======================================================================
FAIL: test_crypt (__main__.BasicAuthenticationTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "trac/web/tests/auth.py", line 208, in test_crypt
    self.assertTrue(self.auth.test('crypt', 'crypt'))
AssertionError: False is not true

----------------------------------------------------------------------
Ran 16 tests in 0.078s

FAILED (failures=1)

On trunk:

(pve) C:\Users\Ryan Ollos\Documents\Workspace\Trac\trac-trunk>python trac/web/te
sts/auth.py
.............Warning: cannot parse password for user "crypt" without the "crypt"
 module. Install the passlib package from PyPI
FWarning: cannot parse password for user "crypt" without the "crypt" module. Ins
tall the passlib package from PyPI
.Warning: cannot parse password for user "crypt" without the "crypt" module. Ins
tall the passlib package from PyPI
.
======================================================================
FAIL: test_crypt (__main__.BasicAuthenticationTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "trac/web/tests/auth.py", line 159, in test_crypt
    self.assertTrue(self.auth.test('crypt', 'crypt'))
AssertionError: False is not true

----------------------------------------------------------------------
Ran 16 tests in 0.093s

FAILED (failures=1)