replaced std::list by std::set for fixedSlotSequen

tasks/FixedTimeslotTaskIF.h

@@ -5,11 +5,13 @@
 #include <framework/tasks/PeriodicTaskIF.h>
 
 /**
- * Following the same principle as the base class IF. This is the interface for a Fixed timeslot task
+ * @brief Following the same principle as the base class IF.
+ *        This is the interface for a Fixed timeslot task
  */
 class FixedTimeslotTaskIF : public PeriodicTaskIF {
 public:
 	virtual ~FixedTimeslotTaskIF() {}
+
 	virtual ReturnValue_t addSlot(object_id_t componentId, uint32_t slotTimeMs, int8_t executionStep) = 0;
 	virtual ReturnValue_t checkSequence() const = 0;
 };