Only get the first cell name result in morpholgy
Only get the first cell name result in morpholgy

Former-commit-id: 1fa0955c2283df213ecd0e2bd072bf77d7ac8b24
travs/PyOpenWorm,gsarma/PyOpenWorm,kaustubhcs/PyOpenWorm,openworm/PyOpenWorm,openworm/PyOpenWorm,hnunner/PyOpenWorm,gsarma/PyOpenWorm