update default ps topic

Author: hernandezc1

broker/consumer/lsst/vm_startup.sh

@@ -23,7 +23,7 @@ fi
 
 #--- GCP resources used in this script
 broker_bucket="${PROJECT_ID}-${survey}-broker_files"
-PS_TOPIC_DEFAULT="${survey}-alerts"
+PS_TOPIC_DEFAULT="${survey}-alerts_raw"
 # use test resources, if requested
 if [ "$testid" != "False" ]; then
     broker_bucket="${broker_bucket}-${testid}"