Updated message.properties

Added required error message for EMPT70.
Kindly refer to the following PR for all relevant details :- openmrs/openmrs-module-legacyui#164

api/src/main/resources/messages.properties

@@ -2166,6 +2166,7 @@ User.useExisting=Use a person who already exists
 User.whichPerson=Which person?
 User.delete.failure=Cannot delete user. There is data attributed to this user
 User.delete.success=Successfully deleted user.
+User.DemographicInfo.length=Error in Demographic Info fields. The maximum allowed length of each field is {0}.
 User.noUsersFound=No users found with given search parameters
 User.creationInfo=Creation Info
 User.retiredInfo=Disabled Info