ExpressionTest : Add test for compatibility with version 0.15 API.
ExpressionTest : Add test for compatibility with version 0.15 API.

appleseedhq/gaffer,hradec/gaffer,chippey/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,hradec/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,chippey/gaffer,boberfly/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,hradec/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,boberfly/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,chippey/gaffer,boberfly/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,chippey/gaffer,hradec/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer,appleseedhq/gaffer,boberfly/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer,hradec/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer