Related Bug:#1350680 --Changed the throughput calculation logic,earlier we are sum up the total interface bandwidth and average with the sample count,now we changed to we are summing the inidividual interface bandwidth

Change-Id: I919c75250e59690f9dba3977d624128869a7a4ea
Merge "Related Bug:#1350680 --Changed the throughput calculation logic,earlier we are sum up the total interface bandwidth and average with the sample count,now we changed to we are summing the inidividual interface bandwidth"