Methods that returns the scaled critical gas (SGCR) saturation and the
scaled critical gas in oil saturation (SOGCR) is added to
BlackoilPropsAdFromDeck and BlackoilPropsAdInterface
A test is added in test_boprops_ad and fluid.data is modified to make
the test non trivial.
i.e. reading the grid properties from EclipseState instead of from the
raw deck. This requires that all deck files exhibit a GRID and a
SCHEDULE section or else EclipseState will throw in the constructor.
