Fix test, taking into account access time field is now always available
Summary: The creation date time field has been introduced but still depends further on kio 5.58+, glibc 2.28+, linux 4.11+ and compatible filesystem (ext4 with 256 bits inodes for instance, btrfs).
Reviewers: astippich, bruns
Reviewed By: astippich
Subscribers: Baloo
Tags: Baloo
Differential Revision: https://phabricator.kde.org/D20763