Update employee.php
Update employee.php

Mantis Ticket: 617
Validation Added:
i)Date Of Joining to Current Place is greater than Date Of Joining to Govt. Health Service.
ii)Date Of Joining to Current Designation is greater than Date Of Joining to Current Place.
nasirkhan/dghs-hrm,nasirkhan/dghs-hrm,nasirkhan/dghs-hrm,nasirkhan/dghs-hrm,nasirkhan/dghs-hrm