Add classname in toString() methods for model classes used for Dynamic Content

Author: aheritier

src/main/java/org/zendesk/client/v2/model/dynamic/DynamicContentItem.java

@@ -200,7 +200,7 @@ public int hashCode() {
 
     @Override
     public String toString() {
-        return "{" +
+        return "DynamicContentItem{" +
         " id='" + getId() + "'" +
         ", url='" + getUrl() + "'" +
         ", name='" + getName() + "'" +
@@ -214,4 +214,4 @@ public String toString() {
     }
 
 
-}
+}

src/main/java/org/zendesk/client/v2/model/dynamic/DynamicContentItemVariant.java

@@ -203,7 +203,7 @@ public int hashCode() {
 
     @Override
     public String toString() {
-        return "{" +
+        return "DynamicContentItemVariant{" +
             " id='" + getId() + "'" +
             ", url='" + getUrl() + "'" +
             ", content='" + getContent() + "'" +
@@ -217,4 +217,4 @@ public String toString() {
     }
 
 
-}
+}