/usr/lib/mysql-testsuite/collections/ is in percona-xtradb-cluster-testsuite-5.5 5.5.34-25.9+dfsg-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/mysql-testsuite/collections/README
/usr/lib/mysql-testsuite/collections/README.experimental
/usr/lib/mysql-testsuite/collections/default.daily
/usr/lib/mysql-testsuite/collections/default.experimental
/usr/lib/mysql-testsuite/collections/default.push
/usr/lib/mysql-testsuite/collections/default.release
/usr/lib/mysql-testsuite/collections/default.release.done
/usr/lib/mysql-testsuite/collections/default.weekly
/usr/lib/mysql-testsuite/collections/disabled-daily.list
/usr/lib/mysql-testsuite/collections/disabled-per-push.list
/usr/lib/mysql-testsuite/collections/disabled-weekly.list