Do the metalink->mirrorlist dodge in live_build mock config

This avoids hitting slow metadata downloads in mock env.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/_live_build.pm

@@ -22,6 +22,8 @@ sub run {
     assert_script_run "head -n-1 /etc/mock/fedora-${version}-${arch}.cfg >> /etc/mock/openqa.cfg";
     # now add the side repo to the config
     assert_script_run 'printf "[advisory]\nname=Advisory repo\nbaseurl=file:///opt/update_repo\nenabled=1\nmetadata_expire=3600\ngpgcheck=0\n\"\"\"" >> /etc/mock/openqa.cfg';
+    # replace metalink with mirrorlist so we don't get slow mirrors
+    assert_script_run "sed -i -e 's,metalink,mirrorlist,g' /etc/mock/openqa.cfg";
     # upload the config so we can check it's OK
     upload_logs "/etc/mock/openqa.cfg";
     # now check out the kickstarts