datanommer: set memory limit to 1Gi

For an unknown reason on staging, the datanommer pod overloads the node memory and
takes down all the running workload with it.
This set a memory limit to 1Gi (pod takes ~200Mi on prod) to avoid
crashing the compute node (and other workload with it) when that happens.

roles/openshift-apps/datanommer/templates/deploymentconfig.yml

@@ -30,6 +30,9 @@ spec:
         imagePullPolicy: Always
         ports:
         - containerPort: 8080
+        resources:
+          limits:
+            memory: 1Gi
         volumeMounts:
         - name: fedora-messaging-config-volume
           mountPath: "/etc/fedora-messaging"