move unit test helpers from AsgTools into new package AsgTesting
This may not be the right thing to worry about and may end up to be somewhat controversial, but it has also been bugging me for a while: So far the AsgTools library links directly against the google-test libraries, meaning that even in production code any package depending on AsgTools (which are a lot) will pull in the unit test library as a dependency. Admittedly that is pretty lightweight, but as a dependency it is completely unnecessary for anything except unit tests.
So what I did was split the unit test helpers into a separate package AsgTesting, and move unit tests from AsgTools into AsgExampleTools, which already holds some of the AsgTools unit tests. And then I also fixed up all the packages I broke with that update. Or at least fixed everything up for AnalysisBase, if there are any more dependencies in the other projects I wouldn't know.