Incorrect check on result code done in the PwdModifyResponseImpl constructor

Incorrect check on result code done in the PwdModifyResponseImpl constructor.

RFC states that:
The server MAY return adminLimitExceeded, busy,
confidentialityRequired, operationsError, unavailable,
unwillingToPerform, or other non-success resultCode as appropriate to
indicate that it was unable to successfully complete the operation.