Updated travis validate translations

Updated travis to use the i18n-tools validate
to validate translations in pullrequests.
LEARNER-2556

updated i18n-tool to latest version

.travis.yml

@@ -23,6 +23,7 @@ install:
 
 script:
     - docker exec -t discovery bash -c 'source /edx/app/discovery/discovery_env && cd /edx/app/discovery/discovery/ && make docs'
+    - docker exec -t discovery bash -c 'source /edx/app/discovery/discovery_env && cd /edx/app/discovery/discovery/ && make check_translations_up_to_date'
     - docker exec -t discovery bash -c 'source /edx/app/discovery/discovery_env && cd /edx/app/discovery/discovery/ && make validate_translations'
     - docker exec -t discovery bash -c 'source /edx/app/discovery/discovery_env && cd /edx/app/discovery/discovery/ && make clean_static'
     - docker exec -t discovery bash -c 'source /edx/app/discovery/discovery_env && cd /edx/app/discovery/discovery/ && make static'

Makefile

@@ -3,7 +3,7 @@ NODE_BIN=$(CURDIR)/node_modules/.bin
 
 .PHONY: accept clean clean_static compile_translations detect_changed_source_translations dummy_translations extract_translations \
 	fake_translations help html_coverage migrate open-devstack production-requirements pull_translations quality requirements.js \
-	requirements start-devstack static stop-devstack test validate validate_translations docs  static.dev static.watch
+	requirements start-devstack static stop-devstack test validate check_translations_up_to_date docs  static.dev static.watch
 
 include .travis/docker.mk
 
@@ -97,7 +97,10 @@ accept: ## Run acceptance tests
 detect_changed_source_translations: ## Check if translation files are up-to-date
 	cd course_discovery && i18n_tool changed
 
-validate_translations: fake_translations detect_changed_source_translations ## Install fake translations and check if translation files are up-to-date
+validate_translations: ## Check if translation files are valid
+	cd course_discovery && i18n_tool validate -v -ca
+
+check_translations_up_to_date: fake_translations detect_changed_source_translations ## Install fake translations and check if translation files are up-to-date
 
 docs:
 	cd docs && make html

requirements/local.txt

@@ -6,7 +6,7 @@ django-debug-toolbar==1.8
 django-elasticsearch-debug-toolbar==1.2.0
 # i18n
 transifex-client==0.12.2
-edx-i18n-tools==0.4.2
+edx-i18n-tools==0.4.4
 
 # docker devstack
 docker-compose>=1.7.1,<2.0.0