Bug # 4561: Move JobId and ContactDetailsId from Employee entity to Job
and ContactDetails respectively.

- EmployeeImpl - Handled NoSuchXXXEntityException.
Employee portlet - changes for setting employeeId on to shared session,
so that other portlets can get it.
Merge pull request #12 from geetaarora01/ln-test

Bug # 4561: Move JobId and ContactDetailsId from Employee entity to Job