OpTestInbandIPMI: Only fail sensor tests if sensor is meant to be present
OpTestInbandIPMI: Only fail sensor tests if sensor is meant to be present

In some fancy ideal world, we'd read this out of machine-xml (MRW)
but that seems to be fraught with difficulty due to all the platforms
we want to exctlude actually including the sensors they don't have in
the MRW.

So, we basically hardcode things based on BMC implementation. Urgh.

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework