We define a valid cell geometry as one in which all components of
all eight corner vertices of a cell have finite coordinate values
(absolute value less than 1.0E+20) and at least one pair of pillar
vertices are separated by a positive distance.
This is a quick fix.
The problem that occurs is the following. After loadbalancing the
FieldPropsManager only has a non-nullptr to the FieldProperties on
the process with rank=0. Therefore most of the calls to it will
segfault. This has not been problem before changeset
2921838895. We did not make any calls to e.g.
FieldProperties::apply_schedule_keywords during a simulation.
Now we do via [eclproblem.hh#L1021-L1022](/OPM/opm-simulators/blob/3e4e62bc4f6f6f8a02eb2d2e4976dc2e2d956313/ebos/eclproblem.hh#L1021-L1022))
