openshift-apps/compose-tracker: add new env variable

This accounts for a change upstream related to switching libraries
from libpagure to ogr. See [1].

[1] https://pagure.io/releng/compose-tracker/c/8174c2d4021e1c2dd25d259dd15c738e5af394d6?branch=master

roles/openshift-apps/compose-tracker/templates/deploymentconfig.yml

@@ -21,8 +21,10 @@ spec:
         - secretRef:
             name: compose-tracker-pagure-token
         env:
+        - name: PAGURE_NAMESPACE
+          value: "releng"
         - name: PAGURE_REPO
-          value: "releng/failed-composes"
+          value: "failed-composes"
         - name: PAGURE_DOMAIN
 {% if env == "staging" %}
           value: "https://stg.pagure.io/"