Test method names missing underscores aren't detected

[Laurens Van Houtven]

Test methods named "testFooBar" aren't flagged as faulty. They should be named test_FooBar.

I'm not sure what the appropriate way to implement this is. Presumably:

1. In any module trial would flag as being a test module
2. Methods with names starting with "test" must also start with "test_"

[Laurens Van Houtven (lvh)]

I came across this here:

http://buildbot.twistedmatrix.com/builders/twistedchecker/builds/1453/steps/run-twistedchecker/logs/new%20twistedchecker%20errors

But that has test methods like:

https://twistedmatrix.com/trac/browser/branches/logfilepy3k-6749/twisted/test/test_logfile.py?rev=40475#L43

Which clearly should be flagged :)