A resubmission of commit bb20804 in PR #2403 and PR #2442 to work with the
current master.
Continues the work in #2619 and #2631 to refactor main simulation loop in
flow to work with the Python bindings.
The run() method in SimulatorFullyImplicitBlackoilEbos.hpp is refactored
in preparation for the implementation of a Python step() function in a
later commit. Currently run() is called from runSimulatorInitOrRun() in
FlowMainEbos.hpp using the runSimulatorRunCallback_(). Later, there
will be other callbacks like runSimulatorStepInitCallback_(), and
runSimulatorStepCallback_(), that will need to call different parts of
the code in run(). The run() function is thus refactored into run(),
runInit(), runStep(), and runLastStep(). Also, some of the local
variables in run() have to be made persistent between calls to
runStep(), this applies to variables report, solverTimer, totalTimer,
and adaptiveTimeStepping, which are made private class variables.
`NEW_PROP_TAG` is now a definition and not just a declaration.
Eliminate superfluous declarations, include headers with definitions.
Make one necessary forward declaration explicit.
