fix NullPointerException in ITicketService and add TestCase

Kevin Walter

2014-04-14 4868740ed7f40ce0cf162f17a8224856ae10a4b0

 src/test/java/com/gitblit/tests/mock/MemorySettings.java

@@ -48,6 +48,11 @@
   }

   @Override
   public boolean saveSettings() {
      return false;
   }

   @Override
   public boolean saveSettings(Map<String, String> updatedSettings) {
      return false;
   }