Fix "Icinga\Logger\Logger not found"

The class was moved to Icinga\Application\Logger.

application/forms/LdapDiscoveryForm.php

@@ -3,10 +3,9 @@
 namespace Icinga\Form;
 
 use Icinga\Application\Config;
-use Icinga\Logger\Logger;
+use Icinga\Application\Logger;
 use Icinga\Protocol\Ldap\Exception as LdapException;
 use Icinga\Protocol\Ldap\Connection;
-use Icinga\Web\Request;
 use Icinga\Protocol\Dns;
 use Icinga\Web\Form\Element\Note;
 use Icinga\Web\Form;

library/Icinga/Installation/GeneralConfigStep.php

@@ -6,7 +6,7 @@ namespace Icinga\Installation;
 
 use Exception;
 use Zend_Config;
-use Icinga\Logger\Logger;
+use Icinga\Application\Logger;
 use Icinga\Web\Setup\Step;
 use Icinga\Application\Config;
 use Icinga\File\Ini\IniWriter;