Use old style traits class approach to check for face tag support.

Old version failed due to a gcc compiler
bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77446 with error:
"non-constant condition for static assertion"

opm/simulators/aquifers/BlackoilAquiferModel_impl.hpp

@@ -26,7 +26,8 @@ BlackoilAquiferModel<TypeTag>::BlackoilAquiferModel(Simulator& simulator)
     : simulator_(simulator)
 {
     // Grid needs to support Facetag
-    assert(supportsFaceTag(simulator.vanguard().grid()));
+    using Grid = std::remove_const_t<std::remove_reference_t<decltype(simulator.vanguard().grid())>>;
+    static_assert(SupportsFaceTag<Grid>::value, "Grid has to support assumptions about face tag.");
 
     init();
 }