Fix Travis 1.8 cucumber

This is cherry-pick of jprovazn's fix for cucumber tests.

Funny thing is that old code that used to pass [1] is now broken too [2]. So something probably changed on Travis. (?)

[1] https://travis-ci.org/aeolusproject/conductor/builds/3721898
[2] https://travis-ci.org/jistr/conductor/builds/3914569