Fix cli default log configuration and js-loader debug message

library/Icinga/Application/Cli.php

@@ -79,7 +79,7 @@ class Cli extends ApplicationBootstrap
                 array(
                     'enable' => true,
                     'level'  => Logger::$INFO,
-                    'type'   => 'stream',
+                    'type'   => 'file',
                     'target' => 'php://stderr'
                 )
             )

public/js/icinga/loader.js

@@ -508,7 +508,7 @@
                 // Icinga.debug(req.getResponseHeader('X-Icinga-Redirect'));
             } else {
                 if (errorThrown === 'abort') {
-                    this.icinga.logger.info(
+                    this.icinga.logger.debug(
                         'Request to ' + url + ' has been aborted for ',
                         req.$target
                     );