Date of birth recorded twice between person and employee

[ehuelsmann]

Version

master

What browsers are you seeing the problem on?

This problem isn't browser related

What happened?

LedgerSMB::Entity::Person::Employee has a dob field to record the date of birth. However, it inherits from LedgerSMB::Entity::Person which has a date of birth field named birthdate.

What should have happened?

LedgerSMB::Entity::Person::Employee should not record the dob, but use the value inherited from Person.