Modified the testing system to look for or generate templates with the physics engine as the prefix. For vortex it still uses the existing files without a physics engine prefix. When doing testing it first looks if a file with the physics engine exists. If it does then it uses that template for the test. If not then it uses the standard vortex one. I converted the OdorMouthEating test to use this method and got the DeleteNodesBeforeOpenChart test passing with it as well. This provides a path forward to fix the remaining tests to work with bullet and vortex.