REPO: Fix Travis tests for 2.6.
REPO: Fix Travis tests for 2.6.

eblur/line_profiler,ymero/line_profiler,ymero/line_profiler,Doctorhoenikker/line_profiler,jsalva/line_profiler,jsalva/line_profiler,eblur/line_profiler,amegianeg/line_profiler,Doctorhoenikker/line_profiler,amegianeg/line_profiler