Vendor cri plugin and add critest

Signed-off-by: Lantao Liu <lantaol@google.com>

script/setup/install-runc

@@ -7,7 +7,7 @@ set -eu -o pipefail
 
 RUNC_COMMIT=$(grep opencontainers/runc ${GOPATH}/src/github.com/containerd/containerd/vendor.conf | cut -d " " -f 2)
 
-go get -u github.com/opencontainers/runc
+go get -d github.com/opencontainers/runc
 cd $GOPATH/src/github.com/opencontainers/runc
 git checkout $RUNC_COMMIT
 make BUILDTAGS="apparmor seccomp" runc install