Update oslo-incubator strutils module
Update oslo-incubator strutils module

Changes -
 * Move `mask_password` to strutils

Change-Id: I0dabf534fdf7fe3582b447a3ad02007df99bb420

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