Tests: fixed exclusive port numbering on win32 platform.

To ensure port uniqueness, reuse option was removed for generated TCP sockets.

lib/Test/Nginx.pm

diff --git a/lib/Test/Nginx.pm b/lib/Test/Nginx.pm
index f19bc76..aeb30ad 100644
--- a/lib/Test/Nginx.pm
+++ b/lib/Test/Nginx.pm
@@ -322,7 +322,6 @@
 		$s_tcp = IO::Socket::INET->new(
 			Proto => 'tcp',
 			LocalAddr => '127.0.0.1:' . $port,
-			Reuse => 1,
 			Listen => 1,
 		) and last;
 	}