Added  unit test.
Merge branch '4.2-dev' of https://github.com/adaptivecomputing/torque into 4.2-dev
Merge branch '4.2-dev' of https://github.com/adaptivecomputing/torque into 4.2-dev
Merge branch '4.2-dev' of https://github.com/adaptivecomputing/torque into 4.2-dev
added unit test for tree
Merge branch '4.2-dev' of https://github.com/adaptivecomputing/torque into 4.2-dev
Fixed a unit test break.