Merge pull request #622 from runzexia/v2beta2-apigroup

add v2beta2 apiversion for autoscaling/v2beta2/hpa

Author: k8s-ci-robot

util/src/main/java/io/kubernetes/client/util/Yaml.java

@@ -76,6 +76,7 @@ private static void initApiGroupMap() {
   private static void initApiVersionList() {
     // Order important
     apiVersions.add("V2beta1");
+    apiVersions.add("V2beta2");
     apiVersions.add("V2alpha1");
     apiVersions.add("V1beta2");
     apiVersions.add("V1beta1");