Elastic search EOL version upgrade

indexer-core/src/test/java/org/opengroup/osdu/indexer/service/IndexerMappingServiceTest.java

@@ -129,6 +129,7 @@ public class IndexerMappingServiceTest {
 
     @Test
     public void should_returnValidMapping_givenFalseMerge_createMappingTest() throws IOException {
+        when(this.indicesClient.exists((GetIndexRequest) any(),any())).thenReturn(true);
         try {
             String mapping = this.sut.createMapping(restHighLevelClient, indexSchema, index, false);
             assertEquals(validMapping, mapping);