add serialization template to TableSchema

opm/parser/eclipse/EclipseState/Tables/TableSchema.hpp

@@ -43,6 +43,13 @@ namespace Opm {
         size_t size() const;
 
         bool operator==(const TableSchema& data) const;
+
+        template<class Serializer>
+        void serializeOp(Serializer& serializer)
+        {
+            m_columns.serializeOp(serializer);
+        }
+
     private:
         OrderedMap<std::string, ColumnSchema> m_columns;
     };