Use generic valid date error for dob upper and lower bound validations#152

Themitchell merged 1 commit intomainNHSDigital/lung_cancer_screening:mainfrom

handle-incorrect-day-month-year-validation-error-for-dobNHSDigital/lung_cancer_screening:handle-incorrect-day-month-year-validation-error-for-dobCopy head branch name to clipboard