Other flent scenarios do not work

[Sai Sindhur Malleni]

The docs say:
For flent,
method - which flent scenario to use, see https://github.com/tohojo/flent/tree/master/flent/tests for the whole list, defaults to tcp_download

However see this when trying to use methods such as tcp_2down, tcp_4up etc. instead of the default tcp_download, tcp_upload and tcp_bidirectional

2016-04-15 14:02:36.611 5293 ERROR shaker.engine.quorum [-] Error while processing reply: Flent returned no data, stderr:
gzip: stdin: unexpected end of file