fix Zabbix API error message

dist/test/datasource-zabbix/datasource.js

@@ -466,13 +466,13 @@ var ZabbixAPIDatasource = function () {
           return {
             status: "error",
             title: error.message,
-            message: error.data
+            message: error.message
           };
         } else if (error.data && error.data.message) {
           return {
             status: "error",
             title: "Connection failed",
-            message: error.data.message
+            message: "Connection failed: " + error.data.message
           };
         } else {
           return {

dist/test/datasource-zabbix/zabbixAPICore.service.js

@@ -83,8 +83,6 @@ var ZabbixAPICoreService = function () {
 
         // Success
         return response.data.result;
-      }).catch(function () {
-        return Promise.reject(new ZabbixAPIError({ data: "Connection Error" }));
       });
     }
 
@@ -125,16 +123,16 @@ var ZabbixAPIError = exports.ZabbixAPIError = function () {
   function ZabbixAPIError(error) {
     _classCallCheck(this, ZabbixAPIError);
 
-    this.code = error.code;
-    this.name = error.data;
-    this.message = error.data;
-    this.data = error.data;
+    this.code = error.code || null;
+    this.name = error.message || "";
+    this.data = error.data || "";
+    this.message = "Zabbix API Error: " + this.name + " " + this.data;
   }
 
   _createClass(ZabbixAPIError, [{
     key: 'toString',
     value: function toString() {
-      return this.name + ": " + this.message;
+      return this.name + " " + this.data;
     }
   }]);