Currently when we do a commmit, we are mounting the container without using
the mountlabel. In certain situations we can leak mount points where the
image is already mounted with a label. If you then attempt to commit the
image, the kernel will attempt to mount the image without a label. The
kernel will reject this mount since SELinux does not allow the same image
to be mounted with different labels.
Passing down the label to the diff drivers, fixes this issue.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>