fix failing test ::data is not allowed

Author: slobodanadamovic

x-pack/plugin/security/qa/multi-cluster/src/javaRestTest/java/org/elasticsearch/xpack/remotecluster/RemoteClusterSecurityRCS1FailureStoreRestIT.java

@@ -181,7 +181,7 @@ private void testSearchingUnauthorizedIndices(
         boolean ccsMinimizeRoundtrips
     ) {
         // try searching remote index for which user has no access
-        final String indexToSearch = randomFrom("other1", "other1::data", otherBackingFailureIndexName, otherBackingDataIndexName);
+        final String indexToSearch = randomFrom("other1", otherBackingFailureIndexName, otherBackingDataIndexName);
         final ResponseException exception = expectThrows(
             ResponseException.class,
             () -> performRequestWithUser(