VNF: add API listVnfAppliances (apache#8994)

Author: weizhouapache

api/src/main/java/org/apache/cloudstack/api/command/admin/vm/ListVnfAppliancesCmdByAdmin.java

@@ -33,4 +33,4 @@
         authorized = {RoleType.Admin},
         since = "4.19.1")
 public class ListVnfAppliancesCmdByAdmin extends ListVnfAppliancesCmd implements AdminCmd {
-}
+}

api/src/main/java/org/apache/cloudstack/api/command/user/vm/ListVnfAppliancesCmd.java

@@ -36,4 +36,4 @@ public class ListVnfAppliancesCmd extends ListVMsCmd implements UserCmd {
     public Boolean getVnf() {
         return true;
     }
-}
+}