added belongs to and has one tests

include/matador/utils/access.hpp

@@ -1,5 +1,5 @@
-#ifndef OOS_ACCESS_HPP
-#define OOS_ACCESS_HPP
+#ifndef MATADOR_ACCESS_HPP
+#define MATADOR_ACCESS_HPP
 
 #include "matador/utils/primary_key_attribute.hpp"
 #include "matador/utils/field_attributes.hpp"
@@ -7,17 +7,7 @@
 
 #include <optional>
 
-namespace matador {
-
-enum class cascade_type;
-
-namespace utils {
-class field_attributes;
-class foreign_attributes;
-class primary_key_attribute;
-}
-
-namespace access {
+namespace matador::access {
 template<class Operator, class Type>
 void process(Operator &op, Type &object) {
   object.process(op);
@@ -92,6 +82,5 @@ void has_many_to_many(Operator &op, const char *id, ContainerType &c, const util
   op.on_has_many_to_many(id, c, attr);
 }
 }
-}
 
-#endif //OOS_ACCESS_HPP
+#endif //MATADOR_ACCESS_HPP