auto-pr issue on travis

[jkremser]

it looks like they start using different netcat tool

https://travis-ci.org/hawkular/hawkular.github.io/builds/272481024#L2443

...
This is nc from the netcat-openbsd package. An alternative nc is available
in the netcat-traditional package.
usage: nc [-46bCDdhjklnrStUuvZz] [-I length] [-i interval] [-O length]
	  [-P proxy_username] [-p source_port] [-q seconds] [-s source]
	  [-T toskeyword] [-V rtable] [-w timeout] [-X proxy_protocol]
	  [-x proxy_address[:port]] [destination] [port]
...