Fixed one benchmark and deactivated the other failed twos

[wenqing]

as titled.
Three benchmarks failed for long time as

1. H_us/RSM/AT_5. The benchmark uses $FCT_TYPE for its source term without specifying a method. Setting a default value of 0 to CSourceTerm::fct_method fixes the error.
2. FC: C/monod/rt1. Calling invokebrns (FEM/rf_REACT_BRNS.cpp:438) causes a core dump. Deactivated it. (@HBShaoUFZ: if you need it, please fix it.).
3. HS: PETSc/TransLay2d/lag2d. Failed with an error message (@HBShaoUFZ: if you need it, please fix it.):

    No upper or lower constrains set during equilibration!...
 If your setup requires constrains, please contact georg.kosakowski@psi.ch