vendorlibs: library/vendor to libary/IcingaVendor

This doesn't make it much better but allows to build a package
libicinga-vendor-php placing those files to /usr/share/php/IcingaVendor
or similar.

refs #4075

library/Icinga/File/Pdf.php

@@ -11,7 +11,7 @@ use Icinga\Web\StyleSheet;
 use Icinga\Web\Url;
 use Icinga\Exception\ProgrammingError;
 
-require_once 'vendor/dompdf/dompdf_config.inc.php';
+require_once 'IcingaVendor/dompdf/dompdf_config.inc.php';
 
 spl_autoload_register('DOMPDF_autoload');
 
@@ -60,4 +60,4 @@ class Pdf extends DOMPDF
             )
         );
     }
-}
+}

library/Icinga/Web/JavaScript.php

@@ -74,7 +74,7 @@ class JavaScript
             }
         }
         if ($minified) {
-            require_once ICINGA_LIBDIR . '/vendor/JShrink/Minifier.php';
+            require_once 'IcingaVendor/JShrink/Minifier.php';
             $out .= Minifier::minify($js, array('flaggedComments' => false));
         } else {
             $out .= $js;

library/Icinga/Web/LessCompiler.php

@@ -67,7 +67,7 @@ class LessCompiler
      */
     public function __construct()
     {
-        require_once 'vendor/lessphp/lessc.inc.php';
+        require_once 'IcingaVendor/lessphp/lessc.inc.php';
         $this->lessc = new lessc();
 
         $this->lessc->setVariables(