This commit passes the run's notion of its active phases, an object
of type Opm::Phases, through to the initialisation layer for the
saturation functions' scaling properties. In particular, this
allows us to discriminate between the phases and to not index into
tables or properties that would not be appropriate (e.g., maximum
gas saturation (SGU) in a simulation run without active gas).
Moreover, we now have enough information to know to look for SOF2 in
two-phase run using family II saturation function keywords. These
changes are necessary in order to extend Flow's support for the
FILLEPS output request to two-phase runs.
motivation: an upcoming parallel frontend to the field props manager.
templated functions cannot be virtualized, and thus having these exposed
would give a great chance of confusing the users in the downstream
code, where properties would be caught from the (potentially) empty
backend instead of from the frontend.
- The lowest level get method is called init_get() - this will unconditionally
create new keyword. The init_get() method is private.
- Introduced FieldDataManager which keeps track of data pointer and status.
- Refactored get( ) implementation
