ECMAScript specific IRP test278 has dynamic datamodel in txml

Hey there,

test278[1] is specific to the ECMAScript datamodel (as per manifest.xml) but does feature a dynamic 'conf:datamodel=""' in its txml description file. With my approach at generating the tests, this will cause it to show up with any other datamodel as well. Can we please substitute 'conf:datamodel=""' by 'datamodel="ecmascript"' as with all other ecmascript specific tests?

Best regards
Stefan

[1] http://www.w3.org/Voice/2013/scxml-irp/278/test278.txml

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