sample loader fails when run on a cluster where not all nodes are 2.0

tool can detect whether all nodes in the cluster are capable of view creation based on compatibility version advertised by ns-server and fail with proper error
or ns-server can hide this tab from settings unless all nodes are in 2.0

or each sample dataset can have a mnifest file which describes what server functionality it expects and then ns-server will allow uploading those docs which are compatible with server version