added missing getter for dataTypePriorityCode (fix https://github.com/cBioPortal/cbioportal/issues/2962)
added missing getter for dataTypePriorityCode (fix https://github.com/cBioPortal/cbioportal/issues/2962)

Signed-off-by: Onur Sumer <s.onur.sumer@gmail.com>

Former-commit-id: 75964d635cda8ed8333b56a8d663f91450044f1b
cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend