Planning: removed the duplicated calculation of speed_ in obstacle constructor.
Planning: removed the duplicated calculation of speed_ in obstacle constructor.

wanglei828/apollo,ApolloAuto/apollo,ApolloAuto/apollo,jinghaomiao/apollo,xiaoxq/apollo,xiaoxq/apollo,wanglei828/apollo,jinghaomiao/apollo,jinghaomiao/apollo,xiaoxq/apollo,ApolloAuto/apollo,ycool/apollo,xiaoxq/apollo,wanglei828/apollo,ApolloAuto/apollo,ycool/apollo,wanglei828/apollo,ycool/apollo,xiaoxq/apollo,jinghaomiao/apollo,wanglei828/apollo,ApolloAuto/apollo,ApolloAuto/apollo,ycool/apollo,jinghaomiao/apollo,jinghaomiao/apollo,wanglei828/apollo,ycool/apollo,xiaoxq/apollo,ycool/apollo