Add some new modelbuilder tests.

These test importing and the hierarchical resource panel.
Status Job ID Name Coverage
  External
passed cdash

pending cmb@master-junction-osx-shared-release
failed cmb@master-kerbin-windows-shared-release

00:00:57

failed cmb@master-moho-linux-shared-relwithdebinfo

00:00:05

failed cmb@master-moho-linux-shared-relwithdebinfo+python3

00:00:08

failed cmb@master-norkit-osx-shared-release

failed cmb@master-praxis-windows-shared-release

00:07:10

running cmb@master-talosiv-osx-shared-release

5547:28:04

failed cmb@master-tatooine-osx-shared-release

00:00:07

passed ghostflow-branch-check-master

failed cmb@master-norkit-osx-shared-release

failed cmb@master-norkit-osx-shared-release

failed cmb@master-norkit-osx-shared-release

failed cmb@master-norkit-osx-shared-release

00:00:20