Improvement of util Module

Worked on test_lock.py. Added few tests which are available at my repo[1]. Increased test coverage of test_lock.py by 25%.

[1] https://bitbucket.org/pkumar/pytest_moin

MoinMoin: pkumar_diary/2011-06-29 (last edited 2011-07-01 19:25:57 by PrashantKumar)