add back lcuene_default as a valid setting for our tests to work out of the box

core/src/main/java/org/elasticsearch/index/engine/EngineConfig.java

@@ -78,6 +78,7 @@ public final class EngineConfig {
         switch(s) {
             case "default":
             case "best_compression":
+            case "lucene_default":
                 return s;
             default:
                 if (Codec.availableCodecs().contains(s) == false) { // we don't error message the not officially supported ones