Update 17.1 helper scripts README (#476)

Update the README to move the OCP_ROUTE_IP to the top making it easier to not
include it when copying the command (since it needs to be populated manually).
Update the default path contents with an oc command to fill that in
automatically.

tests/infrared/17.1/README.md

@@ -3,9 +3,9 @@
 ## Basic deployment
 
 ```bash
-CA_CERT_FILE_CONTENT="$(oc get secret/default-interconnect-selfsigned -o jsonpath='{.data.ca\.crt}' | base64 -d)" \
 OCP_ROUTE_IP="10.0.100.50" \
-AMQP_HOST="default-interconnect-5671-service-telemetry.apps.stf15.localhost" \
+CA_CERT_FILE_CONTENT="$(oc get secret/default-interconnect-selfsigned -o jsonpath='{.data.ca\.crt}' | base64 -d)" \
+AMQP_HOST="$(oc get route default-interconnect-5671 -ojsonpath='{.spec.host}')" \
 ENABLE_STF_CONNECTORS=true \
 ENABLE_GNOCCHI_CONNECTORS=false \
 CONTROLLER_MEMORY="24000" \