[2p2c] Port 2p2c model and use privar switch newton controller

dumux/porousmediumflow/2p2c/implicit/model.hh

...x/porousmediumflow/2p2c/implicit/primaryvariableswitch.hh

dumux/porousmediumflow/2p2c/implicit/propertydefaults.hh

dumux/porousmediumflow/2p2c/implicit/vtkoutputfields.hh

dumux/porousmediumflow/compositional/localresidual.hh

...x/porousmediumflow/compositional/primaryvariableswitch.hh

test/porousmediumflow/2p2c/implicit/injectionproblem.hh

.../porousmediumflow/2p2c/implicit/injectionspatialparams.hh

test/porousmediumflow/2p2c/implicit/test_cc2p2c.cc

test/porousmediumflow/2p2c/implicit/test_cc2p2c.input