register PorousViscoModifiedCamClay in kernelSpecs (#3832)

Author: jhuang2601

src/coreComponents/physicsSolvers/solidMechanics/kernelSpecs.json

@@ -93,7 +93,8 @@
       ],
       "CONSTITUTIVE_TYPE": [
         "PorousSolid<ElasticIsotropic>",
-        "PorousSolid<ModifiedCamClay>"
+        "PorousSolid<ModifiedCamClay>",
+        "PorousSolid<DuvautLionsSolid<ModifiedCamClay>>"
       ],
       "FE_TYPE": [
         "H1_Hexahedron_Lagrange1_GaussLegendre2",