Add wrk2 interop test case
Add wrk2 interop test case

Change-Id: I54a2a319fed67cab1274665bfe5e8421162181a5

lebinh/HdrHistogram_py,joshhobson/HdrHistogram_py,HdrHistogram/HdrHistogram_py,joshhobson/HdrHistogram_py,HdrHistogram/HdrHistogram_py,lebinh/HdrHistogram_py