Added merchant_advice param (#166)

* Added merchant_advice param

* Format

src/main/java/co/omise/models/Charge.java

@@ -91,7 +91,9 @@ public class Charge extends Model {
     @JsonProperty("captured_amount")
     private long capturedAmount;
     @JsonProperty("webhook_endpoints")
-    private List<String> webhookEndpoints; 
+    private List<String> webhookEndpoints;
+    @JsonProperty("merchant_advice")
+    private String merchantAdvice;
 
     public long getAmount() {
         return this.amount;
@@ -501,6 +503,14 @@ public void setWebhookEndpoints(List<String> webhookEndpoints) {
         this.webhookEndpoints = webhookEndpoints;
     }
 
+    public String getMerchantAdvice() {
+        return merchantAdvice;
+    }
+
+    public void setMerchantAdvice(String merchantAdvice) {
+        this.merchantAdvice = merchantAdvice;
+    }
+
     public static class ListRequestBuilder extends RequestBuilder<ScopedList<Charge>> {
         private ScopedList.Options options;
 

src/test/java/co/omise/requests/ChargeRequestTest.java

@@ -25,6 +25,7 @@ public void testGet() throws IOException, OmiseException {
         assertEquals(100000L, charge.getAmount());
         assertEquals("thb", charge.getCurrency());
         assertEquals("trxn_test_4yq7duwb9jts1vxgqua", charge.getTransaction());
+        assertEquals("Test advice", charge.getMerchantAdvice());
     }
 
     @Test

src/test/resources/testdata/fixtures/api.omise.co/charges/chrg_test_4yq7duw15p9hdrjp8oq-get.json

@@ -58,5 +58,6 @@
   "disputable": false,
   "capturable": false,
   "reversible": false,
-  "refundable": false
+  "refundable": false,
+  "merchant_advice": "Test advice"
 }