Tests: to verify upstream fix for bug.
Tests: to verify upstream fix for bug.

This commit is for two tests that verify that the combineMethod of nodes is being stored correctly.

Story:
"Setting for combining variables is not being saved or restored properly."

[#154706564]
https://www.pivotaltracker.com/story/show/154706564

concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models