Add validator property

Author: mythz

src/AndroidClient/android/src/main/java/net/servicestack/client/ValidateRequest.java

@@ -1,6 +1,11 @@
 package net.servicestack.client;
 
 public @interface ValidateRequest {
+    /// <summary>
+    /// Expression to create a validator registered in Validators.Types
+    /// </summary>
+    public String Validator() default "";
+
     /// <summary>
     /// Boolean #Script Code Expression to Test
     /// </summary>

src/AndroidClient/client/src/main/java/net/servicestack/client/ValidateRequest.java

@@ -1,6 +1,11 @@
 package net.servicestack.client;
 
 public @interface ValidateRequest {
+    /// <summary>
+    /// Expression to create a validator registered in Validators.Types
+    /// </summary>
+    public String Validator() default "";
+
     /// <summary>
     /// Boolean #Script Code Expression to Test
     /// </summary>