Testsuite: use @ISA instead of 'parent'

Use parent is available on Perl >= 5.10.1, some old CentOS
do not have it.

diff --git a/test/lib/Exim/Runtest.pm b/test/lib/Exim/Runtest.pm
index bdf9c60d6bcb544baf2d2a51113d62a56e081ef7..32537f5432fa8788db1bea2b9a2b104390c28af1 100644 (file)
--- a/test/lib/Exim/Runtest.pm
+++ b/test/lib/Exim/Runtest.pm
@@ -7,7 +7,9 @@ use IO::Socket::INET;
 use Cwd;
 use Carp;
 
-use parent 'Exporter';
+use Exporter;
+our @ISA = qw(Exporter);
+
 our @EXPORT_OK = qw(mailgroup dynamic_socket exim_binary flavour flavours);
 our %EXPORT_TAGS = (
     all => \@EXPORT_OK,