Various minor changes

- AsynchronousLogin: call common permission methods through CommonService instead of PermissionsManager
- CommandManager: remove superfluous replacement of %p (handled by lazy tag replacer)
- Remove unused method in CommonService
- Create DebugSectionConsistencyTest
- SendMailSSL: Enable debug output if AuthMe log level is set to debug
- Add Utils#logAndSendMessage and replace existing, separate implementations

src/test/java/fr/xephi/authme/service/CommonServiceTest.java

@@ -84,21 +84,6 @@ public class CommonServiceTest {
         verify(messages).send(sender, key, replacements);
     }
 
-    @Test
-    public void shouldRetrieveMessage() {
-        // given
-        MessageKey key = MessageKey.ACCOUNT_NOT_ACTIVATED;
-        String[] lines = new String[]{"First message line", "second line"};
-        given(messages.retrieve(key)).willReturn(lines);
-
-        // when
-        String[] result = commonService.retrieveMessage(key);
-
-        // then
-        assertThat(result, equalTo(lines));
-        verify(messages).retrieve(key);
-    }
-
     @Test
     public void shouldRetrieveSingleMessage() {
         // given

src/test/java/fr/xephi/authme/service/PluginHookServiceTest.java

@@ -58,7 +58,7 @@ public class PluginHookServiceTest {
         assertThat(pluginHookService.isEssentialsAvailable(), equalTo(true));
     }
 
-    // Note ljacqu 20160312: Cannot test with Multiverse or CombatTagPlus because their classes are declared final
+    // Note ljacqu 20160312: Cannot test with CombatTagPlus because its class is declared final
 
     @Test
     public void shouldHookIntoEssentialsAtInitialization() {