createWithAge should use SSN rolling id from 9xx number space

[niom]

createWithAge uses the rolling id uses also real assignable rolling ids and therefor the createWithAge can accidentally create a SSN that is used by a real person.

Functionality should be changed that the default behaviour would generate the SSN with the rolling id only from the 9xx space and creating the rolling id from the 0xx - 8xx space should be given as a parameter.

in Finnish SSN the 9xx space is reserved for temporary SSNs.