Add warn re alpha readiness of distrib mode
Add warn re alpha readiness of distrib mode

Change-Id: I7953a1a8eae65afc6fc3f1fdf64ae1326aa215e4

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