fix for bug 1162887

Users no longer need to disable the plugin to connect to
a different gearman server.

Along with this commit I changed the 'launchWorker' plugin config name to
'enablePlugin' because enabling plugin is distinct from running gearman workers.

Change-Id: Ia81d78da3dbdc83fd46dd7f5d40ccb9aca3af97f

src/test/java/hudson/plugins/gearman/GearmanPluginConfigTest.java

@@ -69,7 +69,7 @@ public class GearmanPluginConfigTest {
 
     @Test
     public void testDefaultLaunchWorker() {
-        assertEquals(Constants.GEARMAN_DEFAULT_LAUNCH_WORKER,
-                gpc.launchWorker());
+        assertEquals(Constants.GEARMAN_DEFAULT_ENABLE_PLUGIN,
+                gpc.enablePlugin());
     }
 }