fix data-table unit test
fix data-table unit test

dgrubelic/material-design-lite,google/material-design-lite,dgrubelic/material-design-lite,i9-Technologies/material-design-lite,tradeserve/material-design-lite,Kekanto/material-design-lite,google/material-design-lite,Kekanto/material-design-lite,i9-Technologies/material-design-lite,tradeserve/material-design-lite