Doing some builds tonight, I noticed TrainLogisticTest is writing its
output to a directory named model in the examples project directory. I
suspect we shouldn't write it there, but I'm being a big sheepish
about 'just fixing' it.
We can either write the model to a temp file using:
getTestTempFile("model").getAbsolutePath();
Or write it to target, e.g: ./target/model -- where it will stick
around until the next clean.
The latter has the advantage of preserving the model for later
(manual) inspection while the former keeps things nice and sparking
clean.
