Initial commit for mistral-i18n support

Adding the _i18n.py file to use oslo.i18n libraries in mistralclient.
Also updating the requirements to support i18n.

Change-Id: Ifeff451d3499d078cefdc0dfea7756cd0291576c
Partial-Implements: blueprint mistral-i18n

mistralclient/i18n.py

@@ -0,0 +1,32 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""oslo.i18n integration module.
+See http://docs.openstack.org/developer/oslo.i18n/usage.html
+"""
+
+import oslo_i18n
+
+_translators = oslo_i18n.TranslatorFactory(domain='mistralclient')
+
+# The primary translation function using the well-known name "_"
+_ = _translators.primary
+
+# Translators for log levels.
+#
+# The abbreviated names are meant to reflect the usual use of a short
+# name like '_'. The "L" is for "log" and the other letter comes from
+# the level.
+_LI = _translators.log_info
+_LW = _translators.log_warning
+_LE = _translators.log_error
+_LC = _translators.log_critical

requirements.txt

@@ -4,6 +4,7 @@
 cliff>=2.3.0 # Apache-2.0
 osc-lib>=1.2.0 # Apache-2.0
 oslo.utils>=3.18.0 # Apache-2.0
+oslo.i18n>=2.1.0  # Apache-2.0
 pbr>=1.8 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0
 PyYAML>=3.10.0 # MIT