This change adds the headers to all requests and responses according the
chapter 4.3.4 of SOL003 2.4.1.

Corrects: Bug 66

Change-Id: Ia57f76fd5904db48e0fbd86ff48b506d165c3e5d
Signed-off-by: Gergely Csatari <gergely.csatari@nokia.com>