tree baa1a5c36e6d65b70cf75d7a9591578527f1ca93
parent e35831f675880f4688ece11508322952275cd495
author Andrew Geissler <geissonator@yahoo.com> 1610727975 -0600
committer Andrew Geissler <geissonator@yahoo.com> 1610727975 -0600

fix pseq-monitor and chassis power off race cond

Downstream testing recently found an issue where chassis power would be
removed before the pseq-monitor had stopped. This caused the
pseq-monitor to log errors.

Reviewing the systemd Conflicts documentation out at
https://www.freedesktop.org/software/systemd/man/systemd.unit.html
highlights some special caveats with the Conflicts statement.
Mainly that ordering is not guaranteed without an After or Before
clause. Testing also showed that when it comes to a service vs. target
conflicts, the most systemd will do is guarantee the conflicting service
is stopped before the target completes.

Give the above constraints, move the pseq-monitor Conflicts to the
obmc-power-stop-pre@.target and add an After clause. The
obmc-power-stop-pre@.target is the target which runs prior to power
being removed from the chassis.

Tested:
- Verified pseq monitor services consistently stop before the power is
  removed from the chassis.

Change-Id: Ic73efc6281c3c422e0b483d4c24cb92228fd5875
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>