Error when Initialiser for non-existing class is generated

[christian-rauch]

If I created a task:

REGISTER_TASKMAP_TYPE("HeatMapScore", exotica::HeatMap);
class HeatMap : public TaskMap, public Instantiable<HeatMapInitializer> {
    ...
}

with

<class name="exotica/HeatMapScore" type="exotica::HeatMap" base_class_type="exotica::TaskMap">

and initialiser:

class HeatMap
extend <exotica_core/object>

It's impossible to create task exotica/HeatMapScore. It will fail with:

TypeError: create_problem(): incompatible function arguments. The following argument types are supported:
    1. (arg0: Initializer) -> exotica::PlanningProblem

Invoked with: ('exotica/UnconstrainedEndPoseProblem', {'PlanningScene': [('exotica/Scene', {...})], 'Maps': [('exotica/HeatMapScore', {'Name': 'HMS'})], 'Cost': [('exotica/Task', {'Task': 'HMS', 'Rho': '1'})], 'Name': 'problem'})

I.e. the initiliser must have the same name as the class that is registered with the class plugin system, no matter which one is used in the object inheritance.

There should be an error like:

Cannot create initializer for class HeatMap.
Available object classes are:
...
....
HeatMapScore
...