Improve EffortImporter spec and add test for setting dropped_lap on a single-lap course.
Improve EffortImporter spec and add test for setting dropped_lap on a single-lap course.

voltagead/OpenSplitTime,SplitTime/OpenSplitTime,voltagead/OpenSplitTime,SplitTime/OpenSplitTime,SplitTime/OpenSplitTime,voltagead/OpenSplitTime