Fix kubectl.sh parameter quoting (#6239)

If the special parameter "$@" is not quoted, the following command will not work:

./kubectl.sh patch storageclass my-storage-class -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

roles/kubernetes/client/tasks/main.yml

@@ -106,7 +106,7 @@
   copy:
     content: |
       #!/bin/bash
-      ${BASH_SOURCE%/*}/kubectl --kubeconfig=${BASH_SOURCE%/*}/admin.conf $@
+      ${BASH_SOURCE%/*}/kubectl --kubeconfig=${BASH_SOURCE%/*}/admin.conf "$@"
     dest: "{{ artifacts_dir }}/kubectl.sh"
     mode: 0755
   become: no