Update item bean class to get documentation link from xml

(cherry picked from commit 6c947962d6)

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/policy/mgt/ui/Item.java

@@ -27,6 +27,7 @@ public class Item {
 
     private String label;
     private String tooltip;
+    private String docLink;
     private String key;
     private String value;
     private boolean isRequired;
@@ -65,6 +66,16 @@ public class Item {
         this.tooltip = tooltip;
     }
 
+    @XmlElement(name = "DocLink")
+    public String getDocLink() {
+        return docLink;
+    }
+
+    public void setDocLink(String docLink) {
+        this.docLink = docLink;
+    }
+
+
     @XmlElement(name = "Key", required = true)
     public String getKey() {
         return key;