Add 100% coverage for soaplib.model.exception.
Add 100% coverage for soaplib.model.exception.

Signed-off-by: Burak Arslan <84007f2f4c33c2a97a33044a3070a1e988bc918f@arskom.com.tr>

arskom/spyne,martijnvermaat/rpclib,martijnvermaat/rpclib,arskom/spyne,martijnvermaat/rpclib,arskom/spyne