Unit tests fixes

fix __class__ not in python2.6's SREPattern

fix reload of util/__init__ for some integration tests,
we rather register the adapters in config.py
dont show passwords in the config

There are two options for doing that.

- this patch
- customize getConfigDict for all classes having passwords (ManHole, IRCStatus, BuildSlaves hierarchy)
pyflakes issues
fix pep8 at version 1.4.6

1.5 brings lots of new errors. They need to be sorted out in another topic branch
config.rst: fix title level

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
Merge branch 'login' of https://github.com/tardyp/buildbot into pull1100