ValidMin & ValidMax values in initialState to avoid NaN

[grumpyinca]

Summary

This issue carries forward work that was started in issue/branch #870.

Changes to be included

1 . Independent Variable ValidMin & ValidMax values in initialState should be adjusted so that they do not generate NaN in dependent equations.
 
2. Change Alerts
from assuming validmin/max as invalid:
INVALID VALUE: OD_Free (1.797e+308) >= Number.MAX_VALUE

to include validmin/max as valid:
INVALID VALUE: OD_Free (1.797e+308) > Number.MAX_VALUE

Item 2 was fixed in #875? Is there more to be done ?