Addressing the sanity hang issue.Tests were hanging on fabric/paramiko on connection retry.Removed paramiko for connectiin check.Using socket to verify that ssh up in vm.Removed retry inside the functions with fabric connect.Istead increased the retry in the vm fixture.Earlier fabfile was copied in each vm sapwn and was hanging there.Removed that and added the code to copy fabfile.py in contrail_test_init.py.
Removing the commented lines
Keeping the comand timeout as 30 secs
Removing retry
Since retry is disabled in run_fab_command_on_node, ping may return none.Handling the exception
Merge pull request #179 from vedujoshi/master

Do not assume server for image location based on IP
Merge pull request #176 from sandip-d/master

Addressing the sanity hang issue.Tests were hanging on fabric/paramiko o...
Remove the extra http string in webserver

Remove the extra http string in webserver and use internal
path by default for cirros image.
Else , it was taking about 5-10mins for each download