Adds test to verify that index-template update is a cluster level per…

…mission

Signed-off-by: Darshit Chanpura <[email protected]>

src/test/java/org/opensearch/security/IndexTemplateClusterPermissionsCheckTest.java

@@ -1,18 +1,12 @@
-
-
 /*
- * Portions Copyright OpenSearch Contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License").
- * You may not use this file except in compliance with the License.
- * A copy of the License is located at
+ * SPDX-License-Identifier: Apache-2.0
  *
- * http://www.apache.org/licenses/LICENSE-2.0
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  *
- * or in the "license" file accompanying this file. This file is distributed
- * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
- * express or implied. See the License for the specific language governing
- * permissions and limitations under the License.
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
  */
 
 package org.opensearch.security;