monitor:configs: Modify Rainier2U poweroff rules

Use the new 'fan_frus_with_nonfunc_rotors' power off cause in the
Rainier 2U power off config, and adjust the other rules.

The new rules are to power off if:
1. A fan is missing at any time.
2. Two fan FRUs have nonfunctional rotors.

So basically the system will stay up if there is one rotor fail or two
fails in the same fan.  As soon as there are fails in multiple fans the
system will power off.  If a fan is missing, it will also power off as
that changes the airflow for the worse.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I6e4013f4ea4460718e8d1831e866ef6257da607a
1 file changed