Fixes compilation of BlackoilPropertiesFromDeck.cpp.

Patch 31c09aed was erroneous as it was trying to assing a
SaturationPropsFromDeck<SatFuncSimpleNonuniform> to a
SaturationPropsFromDeck<SatFuncSimpleUniform> in the constructor
taking the new parser. This patch fixes this.
endpoint scaling: change default threephase_model to gwseg

and throw an exception if "simple" is encountered...

According to Ove, gwseg should be used, because "gwseg is the model
relevant to the norne case - i.e the model eclipse uses.

The fix for the simple model has to wait for a refac of the satfunc
complex."
SimulatorTimer: allow it to be limited to a sub-range of all report steps