Restructure test suite to prepare CPAN release

Change-Id: If3033774f50d33b2e5b3344e3927fd534cef4dfb
diff --git a/t/real/bzk.t b/t/real/bzk.t
index bb5a2f2..8636fb9 100644
--- a/t/real/bzk.t
+++ b/t/real/bzk.t
@@ -28,7 +28,7 @@
 
 use_ok('KorAP::XML::Krill');
 
-my $path = catdir(dirname(__FILE__), '..', 'corpus', 'BZK', 'D59', '00001');
+my $path = catdir(dirname(__FILE__), 'corpus', 'BZK', 'D59', '00001');
 
 ok(my $doc = KorAP::XML::Krill->new( path => $path . '/' ), 'Load Korap::Document');
 ok($doc->parse, 'Parse document');