Update oslo-incubator log module
Update oslo-incubator log module

Changes -
 * Remove None for dict.get()
 * Rename Openstack to OpenStack
 * Fix deprecated messages sent multiple times
 * Use ContextFormatter for imparting context info

Change-Id: I8bf9551081177c756430e536489ef6608b3f488d

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