Fix broken test on 2014.7

I backported #15877 when I should not have, as the feature only existed in develop. Commenting out the `st_ctime` comparison test isn't the best approach, but was the original hotfix on develop when #15826 broke the tests. We'll need to look at a better way to test this on 2014.7 like we are on develop, but this should work for now.

@s0undt3ch ping