- remove properties field in AbstractEntityWithDescription - potentially improves speed
- remove unused methods in TsakType

…edPlanner.traverse

- avoid NullPointerException of referenced tasks
- include edges from scope sequence graphs (partialTaskOrderByScope) to finding sequence graph for tasks that reference other tasks.

- avoid NullPointerException for tasks with task types not having average time, set the duration of such tasks to 4 hours
- avoid NullPointerException by skipping scheduling of tasks whose preceding task according to sequence graph is not scheduled
- schedule each task after the end of all of its preceding tasks according to sequence graph

…ilar-wps.sparql