Fix latency (#288)
Fix latency (#288)

* Use integer value for latency
ZackButcher/mixer,xiaolanz/mixer,guptasu/mixer,xiaolanz/mixer,ZackButcher/mixer,ZackButcher/mixer,douglas-reid/mixer,rkpagadala/mixer,istio/old_mixer_repo,xiaolanz/mixer,jmuk/mixer,douglas-reid/mixer,guptasu/mixer,guptasu/mixer,istio/old_mixer_repo,istio/old_mixer_repo,jmuk/mixer,jmuk/mixer,rkpagadala/mixer,rkpagadala/mixer,douglas-reid/mixer