TestCase : Improve output for assertTypeNamesArePrefixed() failures.
TestCase : Improve output for assertTypeNamesArePrefixed() failures.

We now list all the bad typenames instead of just the first.

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