CompetingTRT_DriftCirclesOnTrackTool.cxx. Use unique_ptr.
requested to merge ATLAS-EGamma/athena:CompetingTRT_DriftCirclesOnTrackTool.cxx_uniquePtr_cppcheck into master
CompetingTRT_DriftCirclesOnTrackTool.cxx. Use unique_ptr. cppcheck complains that when we throw we were leaking the vectors allocated with new
Mentioning @sroe