Update .tx/config with type of files

The Jenkins job for horizon-upstream-translation-update expects that
.tx/config is setup properly. .tx/config is the transifex configuration
file that is used for interaction with transifix.com for translation of
the strings.

If you run the commands from the slave-script, it will update .tx/config
with information about the type of the files (PO-files). This change is
not needed and will break the periodic import script for horizon (which
does not exist).

Note that the slave-script needs a fix to work as well, will fix it in
the config repository. Also, the import script needs to be done.

Reference for jenkins job:
https://jenkins.openstack.org/view/All/job/horizon-upstream-translation-update/lastBuild/

Reference to slave-script:
http://git.openstack.org/cgit/openstack-infra/config/tree/modules/jenkins/files/slave_scripts/upstream_translation_horizon.sh

Change-Id: I9fb6799c8555487941967c2102e1d89c2530b60b

Author: ajaeger

.tx/config

@@ -5,13 +5,17 @@ host = https://www.transifex.com
 file_filter = horizon/locale/<lang>/LC_MESSAGES/django.po
 source_file = horizon/locale/en/LC_MESSAGES/django.po
 source_lang = en
+type = PO
 
 [horizon.openstack-dashboard-translations]
 file_filter = openstack_dashboard/locale/<lang>/LC_MESSAGES/django.po
 source_file = openstack_dashboard/locale/en/LC_MESSAGES/django.po
 source_lang = en
+type = PO
 
 [horizon.horizon-js-translations]
 file_filter = horizon/locale/<lang>/LC_MESSAGES/djangojs.po
 source_file = horizon/locale/en/LC_MESSAGES/djangojs.po
 source_lang = en
+type = PO
+