Possible to assign multiple values to one identifier type while creating a new Patient TRUNK-4293

Hi Dkayiwa,
I have added new identifier to the standard test data set because there are only three identifiers exist in the standard set and one (Social security no) is retired. So many tests are adding identifiers to patient which cause to fail tests. So since having one more identifier is useful for testing purposes, I have added a one. May be this is not the best way. Let me know any changes to be done