Address WildcardFieldMapperTests failure

Author: javanna

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

@@ -1018,7 +1018,7 @@ protected String convertToRandomRegex(String randomValue) {
 
         // Assert our randomly generated regex actually matches the provided raw input.
         RegExp regex = new RegExp(result.toString());
-        Automaton automaton = regex.toAutomaton();
+        Automaton automaton = Operations.determinize(regex.toAutomaton(), Operations.DEFAULT_DETERMINIZE_WORK_LIMIT);
         ByteRunAutomaton bytesMatcher = new ByteRunAutomaton(automaton);
         BytesRef br = new BytesRef(randomValue);
         assertTrue(