SYSML21 — ActivityParameterNodes should be mapped

Currently, ActivityParameterNodes are not mapped to v2. Instead, only the Parameter of the Activity is mapped to a parameter of the ActionDefinition. However, it is not possible to connect the parameter by a succession flow with a parameter of an action usage, for example.

Instead, map an ActivityParameterNode to an ActionUsage with corresponding input and output parameters and bind the ActionDefinition parameter with the corresponding ActionUsage parameter. For example:

action def {
  in inputParameter: Integer;
  bind inputParameter = __inputParameter.outbound;
  action __inputParameter {
    in ref outbound;
    out ref inbound: Integer;
  }
}