Base class for cascades and tests
Add source[T] to JobTest for more flexible tests.
fix insert for multiple fields
Merge pull request #371 from adamilardi/cascade

 base class for cascades
Merge pull request #427 from twitter/fix-insert

Merged #427
Merge pull request #426 from reconditesea/klin_i412

Add source[T] to JobTest for more flexible tests.