Fixed BGPCEP tests

Add missing binding-data-codec
This dependency is pulled in now by sal-binding-broker.

Change-Id: Ic7be4dcbe0a00da73a2ab440076ac96baff2f5a1
Signed-off-by: Robert Varga <rovarga@cisco.com>
Signed-off-by: Milos Fabian <milfabia@cisco.com>