Fix issues with logging handlers

Review Request #7639 — Created Sept. 19, 2015 and submitted — Latest diff uploaded

Information

Djblets
release-0.8.x

Reviewers

Logging handlers weren't being imported, leading to an occassional
exception. The FileHandler class was also being used from the wrong
module on Windows. These issues have been addressed.

Ran unit tests on Python 2.6 and Python 2.7.