Refactor to remove serviceLocator

- This removes all dependencies on deprecated ServiceLocator class.
- Also does some cleanup in the settingsService

Signed-off-by: Ben Kelsey <bfkelsey@gmail.com>

airsonic-main/src/test/java/org/airsonic/player/service/metadata/MetaDataParserTestCase.java

@@ -21,6 +21,7 @@ package org.airsonic.player.service.metadata;
 
 import junit.framework.TestCase;
 import org.airsonic.player.domain.MediaFile;
+import org.airsonic.player.service.SettingsService;
 
 import java.io.File;
 
@@ -45,6 +46,11 @@ public class MetaDataParserTestCase extends TestCase {
                 return false;
             }
 
+            @Override
+            SettingsService getSettingsService() {
+                return null;
+            }
+
             public boolean isApplicable(File file) {
                 return false;
             }