move all services s/obmc-standby/multi-user/g

Transition all the services away from the custom obmc-standby service to
the default multi-user target.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Icc5cd0eb0767318f27fd8d568818659a50bbd987
diff --git a/power-control/service-files/obmc-chassis-powerreset@.target b/power-control/service-files/obmc-chassis-powerreset@.target
index 6f93925..7bce100 100644
--- a/power-control/service-files/obmc-chassis-powerreset@.target
+++ b/power-control/service-files/obmc-chassis-powerreset@.target
@@ -4,4 +4,4 @@
 RefuseManualStop=yes
 
 [Install]
-WantedBy=obmc-standby.target
\ No newline at end of file
+WantedBy=multi-user.target
\ No newline at end of file