added parallel http querying
added parallel http querying

ben-jones/centinel,lianke123321/centinel,JASONews/centinel,rpanah/centinel,iclab/centinel,iclab/centinel,lianke123321/centinel,iclab/centinel,rpanah/centinel,lianke123321/centinel,Ashish1805/centinel,rpanah/centinel