First steps for i18n support

* babel.cfg added;
* translations initialized for all endpoints;
* i18n tools cfgs added.

Partially implements blueprint savanna-i18n

Change-Id: I431d703c6193cc4af9324492209bda27075a78a8

babel.cfg

@@ -0,0 +1 @@
+[python: **.py]

savanna/cli/savanna_api.py

@@ -15,6 +15,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import gettext
 import os
 import sys
 
@@ -33,6 +34,8 @@ if os.path.exists(os.path.join(possible_topdir,
                                '__init__.py')):
     sys.path.insert(0, possible_topdir)
 
+gettext.install('savanna', unicode=1)
+
 from savanna import config
 from savanna.db import api as db_api
 import savanna.main as server

savanna/db/migration/cli.py

@@ -13,8 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import gettext
+
 from oslo.config import cfg
 
+gettext.install('savanna', unicode=1)
+
 from savanna.db import api as db_api
 
 

savanna/locale/README

@@ -0,0 +1 @@
+Savanna translations

setup.cfg

@@ -13,3 +13,8 @@ cover-inclusive=true
 verbosity=3
 detailed-errors=1
 where=savanna/tests
+
+[extract_messages]
+keywords = _ gettext ngettext l_ lazy_gettext
+mapping_file = babel.cfg
+output_file = savanna/locale/savanna.pot