OSLLightUI : Fix metadata for child plugs of parameters
OSLLightUI : Fix metadata for child plugs of parameters

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