Added missing include for multiple domain gettext

Merged with DMPRoadmap:master

Fix new bug in FastGettext config

Fix bug choosing locale with region suffix

updated fastgettext initializer to use its own default_locale method

Fix broken tests caused by locale configuration (#1875) ...

* Fix broken tests caused by locale configuration

- Add LocaleSet
- Add LocaleFormatter to force proper string formats
- Rename I18n formats to use hyphen
- Add rake task for updating existing languages on DB
- Fix instances of US english in the templates

* Fix FastGettext initializer loader

* Add Amazon S3 creds for Travis

* Revert "Add Amazon S3 creds for Travis"

This reverts commit 366c1a7.

* Fix Faker localization for rake tasks

Was breaking rake db:seed file

Add tests for locale setting (#1823) ...

* Add tests for locale setting

- Adds Faker::Language module for testing languages with real-ish data
- Refactors global constants into Language model (See Issue#1696)
- Add specs to test locale change works

* Clean up language files to remove long names

* Add DB check in FastGettext initializer

* Set Memory cache for temporary caching solution

* Fix bug in Plan Rule

Moved DMP OPIDoR specific translations to its own gettext domain

made gettext calm down about fuzzy translations (no more warnings)

Get rid of rogue fuzzy translations - Closes #239

Quick fix for i18n issue which prevents db:setup because of lack of Languages table

Language switcher hidden if only one language is installed. DMPRoadmap/roadmap#110

config/initializers/locale.rb getters/setters pointing at FastGettext. en-UK renamed to en_GB. DMPRoadmap/roadmap#98

URLs without locale param

started the migration from i18n to gettext