Fix old style class declaration
Fix old style class declaration

Use new style (inherit from `object`) instead of old style class declaration

Change-Id: Ife13065cce0213984eed6f909e89dabb15ecbd44
Closes-Bug: #1380723

matips/iosr-2015,bigfootproject/sahara,henaras/sahara,redhat-openstack/sahara,zhangjunli177/sahara,esikachev/sahara-backup,esikachev/sahara-backup,zhujzhuo/Sahara,esikachev/scenario,xme1226/sahara,citrix-openstack-build/sahara,egafford/sahara,xme1226/sahara,openstack/sahara,matips/iosr-2015,esikachev/scenario,esikachev/sahara-backup,openstack/sahara,matips/iosr-2015,zhujzhuo/Sahara,egafford/sahara,zhangjunli177/sahara,zhujzhuo/Sahara,bigfootproject/sahara,crobby/sahara,xme1226/sahara,tellesnobrega/sahara,citrix-openstack-build/sahara,tellesnobrega/sahara,ekasitk/sahara,henaras/sahara,bigfootproject/sahara,zhangjunli177/sahara,henaras/sahara,crobby/sahara,redhat-openstack/sahara,redhat-openstack/sahara,crobby/sahara,ekasitk/sahara,esikachev/scenario,citrix-openstack-build/sahara,ekasitk/sahara