GafferTest : Add GAFFERTEST_ASSERTEQUAL macro
GafferTest : Add GAFFERTEST_ASSERTEQUAL macro

This can provide a more useful error than GAFFERTEST_ASSERT.

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