Configure rspec for documentation + color

This provides nicer output in e.g. jenkins.

Change-Id: I422249b7e227c3e2064eaf1ad7186a271ada5597
Reviewed-on: https://gerrit.causes.com/23045
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>

Author: Aiden Scandella

spec/spec_helper.rb

@@ -1,5 +1,11 @@
 require 'overcommit'
 
+RSpec.configure do |config|
+  config.color_enabled = true
+  config.tty = true
+  config.formatter = :documentation
+end
+
 def exit(*args) ; end
 
 # Silence output to STDOUT