[FMN] Update fasjson configuration

The new version of FMN is completely ported to python3, so we can remove some
python2 related things, also enable fasjson for staging.

Signed-off-by: Michal Konečný <mkonecny@redhat.com>

roles/notifs/backend/tasks/main.yml

@@ -55,7 +55,7 @@
   - tasks.py
   - util.py
   when:
-    inventory_hostname.startswith('notifs-backend01.iad')
+    inventory_hostname.startswith('notifs-backend01.iad') or env != 'staging'
   tags:
   - notifs
   - notifs/backend

roles/notifs/backend/templates/fmn.consumer.py

@@ -91,21 +91,20 @@ config = {
     # The notification backend uses this to build a fas cache of ircnicks
     # to fas usernames so it can act appropriately on certain message types.
     {% if env == 'staging' -%}
-    "fas_credentials": {
-        "username": "{{fedoraDummyUser}}",
-        "password": "{{fedoraDummyUserPassword}}",
-        "base_url": "https://accounts.stg.fedoraproject.org",
+    "fasjson": {
+        "active": True,
+        "url": "https://fasjson.stg.fedoraproject.org/"
     },
     {% else -%}
     "fasjson": {
         "active": True,
         "url": "https://fasjson.fedoraproject.org/"
     },
+    {% endif %}
     "fas_credentials": {
         "username": "{{fedoraDummyUser}}",
         "password": "{{fedoraDummyUserPassword}}",
     },
-    {% endif %}
 
 
     ## Backend stuff ##