the bug of active/inactive mineral reactions has been found by RZ. This commit is fixing it.
switch on the longer simulation time to test monod2d example.
This pointer is not used. Therefore it is now deleted. The solve_minimization function used in local problem is not exaclty the same as the one required in vprime function. Therefore, a new version of solve_minimization will be separately added directly into the class FemDxEQS_GIAReduct.h
adding minimization solve function directly into the FemDxEQS_GIAReduct class, and using it in vprime function.
Notice that this minimization solve function takes matrix form RHS.
Merge branch 'react_trans_GIA' of github.com:HaibingShao/ogs into HaibingShao-react_trans_GIA
updating vprime