fixes ping bug in json cfg files

linspector.json

@@ -199,6 +199,10 @@
                 "htmlcontent":
                 [
                     { "url": "@host/test.php", "content": "<h1>Server up!</h1>" }
+                ],
+                "ping":
+                [
+                    {}
                 ]
             }
         }

linspector.minimal.json

@@ -18,10 +18,10 @@
             "filters": {"email": "you@hanez.org"}
         }
     },
-    "periods": {"twentyfourseven": {"minute": "*/1", "second": "0", "comment": "Cron Job / Every minute"}},
+    "periods": {"every10Secs": {"seconds": "10", "comment": "Interval job; every 10 seconds"}},
     "hosts":
     {
-        "hanez1": {"host": "www1.hanez.org", "services": {}},
+        "hanez1": {"host": "www1.hanez.org", "services": {"ping":[{}]}},
         "hanez2": {"host": "www2.hanez.org", "services": {}}
     },
     "hostgroups":