Add translation support for tacker-horizon

This patch adds translation support as suggested by the global
guidelines.

Change-Id: I661ba2e3b39038663d2e1260e50d6bc82305ac96

babel-django.cfg

@@ -0,0 +1,5 @@
+[extractors]
+django = django_babel.extract:extract_django
+
+[python: **.py]
+[django: **/templates/**.html]

babel-djangojs.cfg

@@ -0,0 +1,14 @@
+[extractors]
+# We use a custom extractor to find translatable strings in AngularJS
+# templates. The extractor is included in horizon.utils for now.
+# See http://babel.pocoo.org/docs/messages/#referencing-extraction-methods for
+# details on how this works.
+angular = horizon.utils.babel_extract_angular:extract_angular
+
+[javascript: **.js]
+
+# We need to look into all static folders for HTML files.
+# The **/static ensures that we also search within
+# /openstack_dashboard/dashboards/XYZ/static which will ensure
+# that plugins are also translated.
+[angular: **/static/**.html]

openstack_dashboard_extensions/_80_nfv.py

@@ -1,5 +1,6 @@
 DASHBOARD = 'nfv'
 DISABLED = False
 ADD_INSTALLED_APPS = [
+    'tacker_horizon',
     'tacker_horizon.openstack_dashboard.dashboards.nfv',
 ]

tox.ini

@@ -49,3 +49,8 @@ commands = {posargs}
 [flake8]
 show-source = True
 max-complexity = 20
+
+[testenv:makemessages]
+commands =
+    pybabel extract -F babel-django.cfg -o tacker_horizon/locale/django.pot -k gettext_noop -k gettext_lazy -k ngettext_lazy:1,2 -k ugettext_noop -k ugettext_lazy -k ungettext_lazy:1,2 -k npgettext:1c,2,3 -k pgettext_lazy:1c,2 -k npgettext_lazy:1c,2,3 tacker_horizon
+    pybabel extract -F babel-djangojs.cfg -o tacker_horizon/locale/djangojs.pot -k gettext_noop -k gettext_lazy -k ngettext_lazy:1,2 -k ugettext_noop -k ugettext_lazy -k ungettext_lazy:1,2 -k npgettext:1c,2,3 -k pgettext_lazy:1c,2 -k npgettext_lazy:1c,2,3 tacker_horizon