Revert "Run ac_daemon from user-session as it requires X to function properly"

Revert "Run ac_daemon from user-session as it requires X to function properly"

This reverts commit 7dd6b68dd1006e2fa77f94bb4af8d5879ad2f062.

Conflicts:

	packaging/aul.spec

We will move back ac.service/amd from user session to system.

From the aul maintainer, /usr/bin/amd has to be run as root, reasons:

1. /usr/bin/amd sets app privilege.
2. /usr/bin/amd mounts cgroup subsystem.
3. When handling some command packets, caller's privilege should be checked.
   (Only amd can request terminate  and reset to applications)

Change-Id: Ie7b58f8b5ad6295c0321bb5d8ca9cfb3facdc50a
Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>