Change default TEMPLATE_DIRS setting

Refs #3363

/var/lib/* is commonly used to store application generated data and not
as a place to configure installed software.

For every Synnefo app, the administrator is free to install a modified
copy of a template under /etc/synnefo/templates.
This will activate the new template, even without restarting gunicorn.

snf-webproject/synnefo/webproject/settings/default/apps.py

@@ -17,7 +17,7 @@ ROOT_URLCONF = 'synnefo.webproject.urls'
 
 # Additional template dirs.
 TEMPLATE_DIRS = (
-    '/usr/share/synnefo/templates/'
+    '/etc/synnefo/templates/'
 )
 
 LANGUAGES = (