openqa: set base_url in openqa.ini

this is needed for openID auth to work properly - otherwise
ipsilon thinks the request is coming from 'https://localhost'
and redirect after auth fails. openQA uses this config setting
for the openID base URL if it's set.

roles/openqa/server/tasks/main.yml

@@ -111,7 +111,7 @@
   - config
 
 - name: OpenQA config
-  copy: src=openqa.ini dest=/etc/openqa/openqa.ini owner=geekotest group=root mode=0640
+  template: src=openqa.ini.j2 dest=/etc/openqa/openqa.ini owner=geekotest group=root mode=0640
   tags:
   - config
 

roles/openqa/server/templates/openqa.ini.j2

@@ -1,5 +1,6 @@
 [global]
 branding = plain
+base_url = https://{{ external_hostname }}
 
 [auth]
 method=OpenID