Update oslo-incubator db module
Update oslo-incubator db module

Changes -
 * Removed copyright from empty files

Change-Id: I8e14e7cedde79d953b9b6fde16bf341994f6e56b

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