java 기본 생성자 누락 부분 재추가

Author: jschoiRR

api/src/main/java/org/apache/cloudstack/api/command/admin/host/ListHostsCmd.java

@@ -218,6 +218,9 @@ public String getStorageAccessGroup() {
         return storageAccessGroup;
     }
 
+    public ListHostsCmd() {
+    }
+
     public ListHostsCmd(String storageAccessGroup) {
         this.storageAccessGroup = storageAccessGroup;
     }