Add more metrics to AccidentsComplex workload.
Add more metrics to AccidentsComplex workload.

kexinrong/macrobase,stanford-futuredata/macrobase,kexinrong/macrobase,kexinrong/macrobase,stanford-futuredata/macrobase,stanford-futuredata/macrobase,stanford-futuredata/macrobase,stanford-futuredata/macrobase,kexinrong/macrobase,kexinrong/macrobase,kexinrong/macrobase,kexinrong/macrobase