Call verbosity setter

You'd think that adding one line of do-nothing test coverage is
pointless, but at least it would have caught that embarrassing omitted
definition as a linker error.

Author: roystgnr

tests/mesh/mesh_tet_test.C

@@ -375,6 +375,10 @@ public:
 
     Mesh mesh(*TestCommWorld);
     NetGenMeshInterface net_tet(mesh);
+
+    // This should give no output for our correctly-set-up inputs
+    net_tet.set_verbosity(50);
+
     testTrisToTets(mesh, net_tet);
     testBcids(mesh);
   }