#1120 Use empty "realname" when converting from flatfile

- FlatFile doesn't store the "realname" - all names are always in all-lowercase. Converting from flatfile to other data source should therefore not take over an auth's realname
- Adjust sample flatfile file to only have all-lowercase usernames

src/main/java/fr/xephi/authme/datasource/converter/AbstractDataSourceConverter.java

@@ -37,7 +37,7 @@ public abstract class AbstractDataSourceConverter<S extends DataSource> implemen
     // which is never the case when a converter is launched from the /authme converter command.
     @Override
     public void execute(CommandSender sender) {
-        if (!destinationType.equals(destination.getType())) {
+        if (destinationType != destination.getType()) {
             if (sender != null) {
                 sender.sendMessage("Please configure your connection to "
                     + destinationType + " and re-run this command");
@@ -59,6 +59,7 @@ public abstract class AbstractDataSourceConverter<S extends DataSource> implemen
             if (destination.isAuthAvailable(auth.getNickname())) {
                 skippedPlayers.add(auth.getNickname());
             } else {
+                adaptPlayerAuth(auth);
                 destination.saveAuth(auth);
                 destination.updateQuitLoc(auth);
             }
@@ -72,6 +73,15 @@ public abstract class AbstractDataSourceConverter<S extends DataSource> implemen
             + " to " + destinationType);
     }
 
+    /**
+     * Adapts the PlayerAuth from the source before it is saved in the destination.
+     *
+     * @param auth the auth from the source
+     */
+    protected void adaptPlayerAuth(PlayerAuth auth) {
+        // noop
+    }
+
     /**
      * @return the data source to convert from
      * @throws Exception during initialization of source

src/main/java/fr/xephi/authme/datasource/converter/ForceFlatToSqlite.java

@@ -1,5 +1,6 @@
 package fr.xephi.authme.datasource.converter;
 
+import fr.xephi.authme.data.auth.PlayerAuth;
 import fr.xephi.authme.datasource.DataSource;
 import fr.xephi.authme.datasource.FlatFile;
 
@@ -25,4 +26,11 @@ public class ForceFlatToSqlite extends AbstractDataSourceConverter<FlatFile> {
     public FlatFile getSource() {
         return source;
     }
+
+    @Override
+    protected void adaptPlayerAuth(PlayerAuth auth) {
+        // Issue #1120: FlatFile returns PlayerAuth objects with realname = lower-case name all the time.
+        // We don't want to take this over into the new data source.
+        auth.setRealName("Player");
+    }
 }