use KAFKA_BROKER in status topic

Author: rerpha

forwarder_launch.bat

@@ -13,4 +13,5 @@ set "EPICS_CA_ADDR_LIST=127.255.255.255 130.246.55.255"
 set "EPICS_CA_AUTO_ADDR_LIST=NO"
 
 echo "starting forwarder"
-python %~dp0forwarder_launch.py --status-topic=%BROKER%/%INSTRUMENT%_forwarderStatus --config-topic=%KAFKA_BROKER%/%INSTRUMENT%_forwarderConfig --storage-topic=%KAFKA_BROKER%/%INSTRUMENT%_forwarderStorage  --output-broker=%KAFKA_BROKER%
+python %~dp0forwarder_launch.py --status-topic=%KAFKA_BROKER%/%INSTRUMENT%_forwarderStatus --config-topic=%KAFKA_BROKER%/%INSTRUMENT%_forwarderConfig --storage-topic=%KAFKA_BROKER%/%INSTRUMENT%_forwarderStorage  --output-broker=%KAFKA_BROKER%
+