fix number of tests

t/group-rename.t

 use strict;
 use warnings;
 use lib 't/lib';
-use RT::Extension::LDAPImport::Test tests => 66;
+use RT::Extension::LDAPImport::Test tests => undef;
 eval { require Net::LDAP::Server::Test; 1; } or do {
     plan skip_all => 'Unable to test without Net::Server::LDAP::Test';
 };
@@ -114,6 +114,8 @@ ok( $importer->import_users( import => 1 ), 'imported users');
     ok get_group('Test Group 3')->FirstAttribute('LDAPImport-gid-2');
 }
 
+done_testing;
+
 sub is_member_of {
     my $uname = shift;
     my $gname = shift;