move sequencefeature.symbol to bioentity
move sequencefeature.symbol to bioentity


Former-commit-id: ec1af29f4277372a63d8de3b1b62c1dd6a0b2561
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine