changed: put SupportsFaceTag in separate header

this way we don't have to pull in alugrid and polyhedralgrid
in simulator objects that does not use them

flow/flow_blackoil_alugrid.cpp

@@ -65,6 +65,12 @@ struct Vanguard<TypeTag, TTag::FlowProblemAlugrid> {
     using type = Opm::AluGridVanguard<TypeTag>;
 };
 }
+
+template<>
+class SupportsFaceTag<Dune::ALUGrid<3, 3, Dune::cube, Dune::nonconforming>>
+    : public std::bool_constant<true>
+{};
+
 }
 
 int main(int argc, char** argv)

flow/flow_blackoil_polyhedralgrid.cpp

@@ -67,6 +67,12 @@ namespace Properties {
         using type = Opm::EclPolyhedralGridVanguard<TypeTag>;
     };
 }
+
+template<>
+class SupportsFaceTag<Dune::PolyhedralGrid<3, 3>>
+    : public std::bool_constant<true>
+{};
+
 }
 
 int main(int argc, char** argv)