Make sure we have permissions to restore file extended attributes.

[1] ... all processes have read access to extended security attributes,
and write access is limited to processes that have the CAP_SYS_ADMIN
capability.

[2] The file owner and processes capable of CAP_FOWNER are granted the
right to modify ACLs of a file. This is analogous to the permissions
required for accessing the file mode. (On current Linux systems, root
is the only user with the CAP_FOWNER capability.)

[1] https://linux.die.net/man/5/attr
[2] https://linux.die.net/man/1/setfacl

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

Since skopeo v0.1.29 [1] blobs are saved without the .tar extension.
This commit changes the docker-source module to handle both cases (with
or without .tar extension)

	[1] commit: projectatomic/skopeo@43acc74
	Fix skopeo tests with changes to dir transport

	The dir transport has been changed to save the blobs without the .tar extension
	Fixes the skopeo tests failing due to this change

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

This reverts commit 6146e9ab5e36ff894b8c95d00a45db6181ad8472.

Preserve extended file attributes of extracted rootfs as described in
https://github.com/opencontainers/image-spec/blob/master/layer.md

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

Since skopeo v0.1.29 blobs are saved without the .tar extension.

See commit: projectatomic/skopeo@43acc74
Fix skopeo tests with changes to dir transport

The dir transport has been changed to save the blobs without the .tar extension
Fixes the skopeo tests failing due to this change

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>

Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>