[TASK] Switch the Travis configuration to no-sudo
[TASK] Switch the Travis configuration to no-sudo

This allows Travis to use their new container-based infrastructure,
which should speed up the builds.

sgentle/coffeelint,mitar/coffeelint,AsaAyers/coffeelint,lydell/coffeelint,machadoit/coffeelint,cskeppstedt/coffeelint,clutchski/coffeelint,swang/coffeelint