Make sure to read artifact rules after versions so that importing from v2 works

Author: EricWittmann

utils/importexport/src/main/java/io/apicurio/registry/utils/impexp/EntityReader.java

@@ -169,8 +169,8 @@ private void createEntityIndex() {
         entities.addAll(groups);
         entities.addAll(groupRules);
         entities.addAll(artifacts);
-        entities.addAll(artifactRules);
         entities.addAll(versions);
+        entities.addAll(artifactRules);
         entities.addAll(branches);
         entities.addAll(comments);
     }