Renamed method to be consistent.

Author: fabiankessler

src/org/nameapi/client/services/system/SystemServiceFactory.php

@@ -25,7 +25,7 @@ public function __construct(Context $context) {
     /**
      * @return PingerService
      */
-    public function pingerService() {
+    public function pinger() {
         if ($this->pingerService==null) {
             $this->pingerService = new PingerService($this->context);
         }

tests/functional/org/nameapi/client/services/system/pinger/PingerServiceTest.php

@@ -9,7 +9,7 @@
 class PingerServiceTest extends BaseServiceTest {
 
     public function testPing() {
-        $pinger = $this->makeServiceFactory()->systemServices()->pingerService();
+        $pinger = $this->makeServiceFactory()->systemServices()->pinger();
         $result = $pinger->ping();
         $this->assertEquals('pong', $result);
     }