PAPR: tee update log in a separate file so that it won't be truncated

.papr.sh

@@ -82,7 +82,7 @@ if [[ "${PAPR_RUN_UPDATE}" != "0" ]]; then
   update_version="$(echo $target_branch | sed 's/\./_/')"
   # Create basic node-group configmaps for upgrade
   ansible-playbook -vvv -i $PAPR_INVENTORY $PAPR_EXTRAVARS playbooks/openshift-master/openshift_node_group.yml
-  ansible-playbook -vvv -i $PAPR_INVENTORY playbooks/byo/openshift-cluster/upgrades/v${update_version}/upgrade.yml
+  ansible-playbook -vvv -i $PAPR_INVENTORY playbooks/byo/openshift-cluster/upgrades/v${update_version}/upgrade.yml | tee update.log
 fi
 
 upload_journals