fstest.CheckDirectoryEqual checks if any files in the diff matches a
list of known metadataFiles. This only happens if we specify the initial
layer as the first parameter and the mutated layer as the second.
This also enables the read-only view checks, as the bind filter allows
us to mount a layer as ro.
Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>
feb637f92d