Fixed IndexOutOfBoundsException when adding HEADER_SUBTAUTHOR_CHECK

src/main/java/org/genesys/taxonomy/checker/web/service/impl/TaxonomyProcessServiceImpl.java

@@ -204,7 +204,7 @@ public class TaxonomyProcessServiceImpl implements ProcessService {
 				if (outputHeaders.contains(ApplicationUtils.HEADER_SUBTAXA)) {
 					if (!outputHeaders.contains(ApplicationUtils.HEADER_SUBTAUTHOR_CHECK)) {
 						LOG.debug("Adding {} because it's missing", ApplicationUtils.HEADER_SUBTAUTHOR_CHECK);
-						outputHeaders.add(outputHeaders.size(), ApplicationUtils.HEADER_SUBTAUTHOR_CHECK);
+						outputHeaders.add(outputHeaders.indexOf(ApplicationUtils.HEADER_SUBTAUTHOR) + 1, ApplicationUtils.HEADER_SUBTAUTHOR_CHECK);
 						outputMapping.add(outputHeaders.indexOf(ApplicationUtils.HEADER_SUBTAUTHOR_CHECK) + 1, null);
 					}
 				}