Reset defaultConfigFile if defaultOverrideConfigFile exits.
Reset defaultConfigFile if defaultOverrideConfigFile exits.

Currently DefaultConfigFile does not report back the storage.conf file
that is actually used if /etc/containers/storage.conf exists it should
be reported back to the user. This issue was seen with Podman.

Signed-off-by: Daniel J Walsh <7800de746fd39599bc46177380ea6aede7e31e16@redhat.com>

containers/storage,containers/storage,containers/storage