Fix flaky test due to node being used across all tests (opensearch-project#14787)

Signed-off-by: Mohit Godwani <[email protected]>

Author: mgodwan

server/src/test/java/org/opensearch/cluster/applicationtemplates/ClusterStateSystemTemplateLoaderTests.java

@@ -145,4 +145,9 @@ public void testLoadTemplateVersionMismatch() throws IOException {
             )
         );
     }
+
+    @Override
+    protected boolean resetNodeAfterTest() {
+        return true;
+    }
 }