[traefik] bump: 1.4.1 -> 1.4.2
[traefik] bump: 1.4.1 -> 1.4.2

Note: the node-sass stuff happening as part of the build breaks for node
versions that aren't listed on https://github.com/sass/node-sass/releases/tag/v3.13.0
(For the lazy: that's node 0.10, 0.12, 1, 2, 3, 4, 5, 6, 7 on Linux)

So, this changes the node-dependency to core/node6.

Signed-off-by: Stephan Renatus <3d1a7d0a294b6d8e799ad6e122143905f17f9530@chef.io>

be-plans/be,be-plans/be,be-plans/be,be-plans/be