Update documentation for Spark 1.0.0
Update documentation for Spark 1.0.0

Update Sahara documentation to make clear images with Spark 1.0.0
created by the DIB are now supported by the plugin.

Change-Id: Id9ec3b5947ee9212bb2ee77ebc0d4875e08486d8

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