[1pncmintest] rename test, add new reference and calculate source in separate file

test/porousmediumflow/1pncmin/implicit/CMakeLists.txt

test/porousmediumflow/1pncmin/implicit/test_1pncmin.input

test/porousmediumflow/1pncmin/implicit/test_1pncminni_fv.cc

...porousmediumflow/1pncmin/implicit/test_1pncminni_fv.input

test/porousmediumflow/1pncmin/implicit/test_box1pncmin.cc

test/porousmediumflow/1pncmin/implicit/test_box1pncmin.input

test/porousmediumflow/1pncmin/implicit/test_cc1pncmin.cc

test/porousmediumflow/1pncmin/implicit/thermochemproblem.hh

test/porousmediumflow/1pncmin/implicit/thermochemreaction.hh

...ousmediumflow/1pncmin/implicit/thermochemspatialparams.hh

test/references/test_1pncmin-00064_batch.vtu