Merge branch '396_elixir_1.7' into 'develop'

[#396] Required Elixir ~> 1.7.

Closes #396

See merge request !600
2 jobs for develop in 3 minutes and 20 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Lint
passed #12637
lint

00:01:03

 
  Test
passed #12638
unit-testing

00:02:17