Ensure host-shutdown target calls the host-stop target

As a part of the soft power off (host-shutdown) ensure
that the host-stop target always gets called.  Updated the
involved services to ensure they are run in the correct order.

Change-Id: I7e9113631786f0d0cb0f89b94c4b97fdc0328e7b
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/common/recipes-core/systemd/obmc-targets/obmc-power-stop@.target b/common/recipes-core/systemd/obmc-targets/obmc-power-stop@.target
index b32d76f..f0429d7 100644
--- a/common/recipes-core/systemd/obmc-targets/obmc-power-stop@.target
+++ b/common/recipes-core/systemd/obmc-targets/obmc-power-stop@.target
@@ -1,5 +1,6 @@
 [Unit]
 Description=Power%i Off
+Wants=obmc-power-stop-pre@%i.target
 After=obmc-power-stop-pre@%i.target
 Wants={SYSTEMD_DEFAULT_TARGET}
 Conflicts=obmc-chassis-poweron@%i.target