merging ICMP error handling testcases from mainline:commit id 9cdab9f71092a9847478be96d464d2aad0a7dae6
Merge remote-tracking branch 'bhushana/master'
moved traffic.py and traceroute_2.0.18-1_amd64.deb to contrail-test/tcutils
Merge pull request #140 from alokkumar223/master

merging ICMP error handling testcases from mainline:commit id 9cdab9f710...