UBUNTU: SAUCE: apparmor: special case unconfined when determining the mode

UBUNTU: SAUCE: apparmor: special case unconfined when determining the mode

when viewing a stack involving unconfined from across a ns boundary
the mode is reported as mixed.

Eg.
lxc-container-default//&:lxdns1://unconfined (mixed)

This is because the unconfined profile is in the special unconfined
mode. Which will result in a (mixed) mode for any stack with profiles
in enforcing or complain mode.

This can however lead to confusion as to what mode is being used as
mixed is also used for enforcing stacked with complain. Since unconfined
doesn't affect the stack just special case it.

BugLink: http://bugs.launchpad.net/bugs/1615890
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>