tests: Retry validating version during downgrades
tests: Retry validating version during downgrades

mqliang/etcd,mqliang/etcd,mqliang/etcd,ajityagaty/etcd,etcd-io/etcd,ajityagaty/etcd,ajityagaty/etcd,mkumatag/etcd,rnaveiras/etcd,mkumatag/etcd,rnaveiras/etcd,etcd-io/etcd,etcd-io/etcd,rnaveiras/etcd,mkumatag/etcd