fix WildcardFieldMapperTests to include

Author: ChrisHegarty

x-pack/plugin/wildcard/src/test/java/org/elasticsearch/xpack/wildcard/mapper/WildcardFieldMapperTests.java

@@ -1017,7 +1017,8 @@ protected String convertToRandomRegex(String randomValue) {
         }
 
         // Assert our randomly generated regex actually matches the provided raw input.
-        RegExp regex = new RegExp(result.toString());
+        int includeDeprecatedComplement = RegExp.ALL | RegExp.DEPRECATED_COMPLEMENT;
+        RegExp regex = new RegExp(result.toString(), includeDeprecatedComplement);
         Automaton automaton = Operations.determinize(regex.toAutomaton(), Operations.DEFAULT_DETERMINIZE_WORK_LIMIT);
         ByteRunAutomaton bytesMatcher = new ByteRunAutomaton(automaton);
         BytesRef br = new BytesRef(randomValue);