Revisit loading of test configuration in turbogears.testutil

[Chris Arndt]

The code in turbogears.testutil to load the configuartion from test.cfg and from the application's config package is very dodgy and should be improved and refactored.

Problems:

• Code runs on importing the module, which IMHO is not so good. Maybe we should only load the configuration when starting TurboGears in testutil.start_server.
• The code looks through all sub-directories of the current working directory for a Python package named config and, when found, passed this to pkg_resources (via config.update_config), but it doesn't check whether the package is actually on the Python path. This leads to an error when your project directory has a sub-directory (and not below the application's 'package' directory), which contains a config package (which normally is not on the Python path).
• The current code to check whether a potential package directory's filename contains invalid Python identitifier chars is not correct.

[Chris Arndt]

Added a fix for the third problem mentioned above and a temporary workaround for the second in r5708.

But we should still rethink the whole test configuration loading approach.

[Chris Arndt]

Moving to 1.1.x bugfix release in preparation for 1.1rc1 release.

[chrisz]

Moved to  https://sourceforge.net/p/turbogears1/tickets/8/.