Fix the syntax of the cache module
Fix the syntax of the cache module

Change-Id: I60439c953036480e49006795d0f882e0429c7f75
Closes-Bug: #1410405

CiscoSystems/networking-odl,openstack/networking-odl,openstack/networking-odl,FedericoRessi/networking-odl,flavio-fernandes/networking-odl,FedericoRessi/networking-odl,schoksey/networking-odl,schoksey/networking-odl,flavio-fernandes/networking-odl,openstack/networking-odl,CiscoSystems/networking-odl