Test routines that are not properly set up for MPI test

[dreamer2368]

A couple of test routines pass on a serial test, though failing on mpi test with multiple processors. The test routines may have been written for a serial test.

In PR #1 , these following routines are turned into a serial test. However, ultimately they should be supported on MPI test as well:

• test/adjoint_relation/sponge

• test/adjoint_relation/SAT_farfield

• test/adjoint_relation/SAT_isothermal

• test/adjoint_relation/artificial_dissipation

• test/adjoint_relation/inviscid_flux

• test/adjoint_relation/viscous_flux

• test/adjoint_relation/body_force

• test/linearized_relation/SAT_farfield_linearized

• test/linearized_relation/SAT_isothermal_linearized

• test/linearized_relation/artificial_dissipation_linearized

• test/linearized_relation/inviscid_flux_linearized

• test/linearized_relation/viscous_flux_linearized

• test/linearized_relation/viscous_flux_C

• test/linearized_relation/body_force_linearized