CommandLocator: use Id instead of QString.

There seems to be still disagreement in the code what the
individual parameters are meant for.

Change-Id: I9c51e6ee9cc8fd1a55d202b8131027de1ef812a0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/subversion/subversionplugin.cpp

@@ -269,9 +269,8 @@ bool SubversionPlugin::initialize(const QStringList & /*arguments */, QString *e
 
     addAutoReleasedObject(new CheckoutWizard);
 
-    const QString description = QLatin1String("Subversion");
     const QString prefix = QLatin1String("svn");
-    m_commandLocator = new Locator::CommandLocator(description, prefix, prefix);
+    m_commandLocator = new Locator::CommandLocator("Subversion", prefix, prefix);
     addAutoReleasedObject(m_commandLocator);
 
     //register actions