PUB-703: Add option to create frames with positive response (for regression problems only).
Is not yet available from the UI/R.
HEX-1831: Added Junit test for GLM with random data and all parameter cross-combinations using nested loops.
Not working right now, TODO: Fix GLM2.invoke() to allow running without calling the constructor.
Currently, this JUnit test is only running via JUnitRunnerDebug, it's disabled in JUnitRunner.
Merge branch 'master' of https://github.com/0xdata/h2o