Rework images to support some integration types

Rework images to support some integration types

Existing lxc-host-image-minimal support multiconfig based
single root filesystem integration.  On the other hand,
when we want to use multi partition integration, we need
to fully replace lxc-host-image-minimal recipe.

This patch divide lxc-config installation and
single root filesystem integration feature from
lxc-host-image-minimal to agl-lxc-install-single-imgage.inc
and agl-lxc-autostart.inc.
This change realize to support integration types
using lxc-host-image-minimal.

Bug-AGL: SPEC-4777

Change-Id: I95d866ff6eaddf793927aacb056334e573389804
Signed-off-by: Naoto Yamaguchi <naoto.yamaguchi@aisin.co.jp>