Fix problem with rcg.load() and add_contact()

.../scripts/sellar_problem/CMDOWS/FPG_unconverged-OPT-GS.xml

...s/scripts/sellar_problem/CMDOWS/FPG_unconverged-OPT-J.xml

examples/scripts/sellar_problem/CMDOWS/Mdao_IDF.xml

examples/scripts/sellar_problem/CMDOWS/Mdao_MDF-GS.xml

examples/scripts/sellar_problem/CMDOWS/Mdao_MDF-J.xml

...s/scripts/sellar_problem/CMDOWS/Mdao_converged-DOE-GS.xml

...es/scripts/sellar_problem/CMDOWS/Mdao_converged-DOE-J.xml

...s/scripts/sellar_problem/CMDOWS/Mdao_converged-MDA-GS.xml

...es/scripts/sellar_problem/CMDOWS/Mdao_converged-MDA-J.xml

...scripts/sellar_problem/CMDOWS/Mdao_unconverged-DOE-GS.xml

.../scripts/sellar_problem/CMDOWS/Mdao_unconverged-DOE-J.xml

...scripts/sellar_problem/CMDOWS/Mdao_unconverged-MDA-GS.xml

.../scripts/sellar_problem/CMDOWS/Mdao_unconverged-MDA-J.xml

...scripts/sellar_problem/CMDOWS/Mdao_unconverged-OPT-GS.xml

.../scripts/sellar_problem/CMDOWS/Mdao_unconverged-OPT-J.xml

examples/scripts/sellar_problem/CMDOWS/RCG.xml

examples/scripts/sellar_problem/KDMS/FPG_IDF.kdms

examples/scripts/sellar_problem/KDMS/FPG_MDF-GS.kdms

examples/scripts/sellar_problem/KDMS/FPG_MDF-J.kdms

...les/scripts/sellar_problem/KDMS/FPG_converged-DOE-GS.kdms