Bug 1432 - Generated DTOs for types use inefficient instantiation

- changed method for generating default instance value
- only for types (boolean, byte, short, int and long)

Change-Id: I4a423f3569ed84f4d6aff8efe97a110045c6e7c7
Signed-off-by: Ladislav Borak <lborak@cisco.com>
Merge "Bug 1432 - Generated DTOs for types use inefficient instantiation"