Update kafka-sw-gen-traffic.sh

Fixed `kubectl exec` syntax

Signed-off-by: Dean <22192242+saintdle@users.noreply.github.com>

examples/kubernetes-kafka/kafka-sw-gen-traffic.sh

@@ -1,20 +1,18 @@
 #!/usr/bin/env bash
 
-
 HQ_POD=$(kubectl get pods -l app=empire-hq -o jsonpath='{.items[0].metadata.name}')
 OUTPOST_8888_POD=$(kubectl get pods -l outpostid=8888 -o jsonpath='{.items[0].metadata.name}')
 OUTPOST_9999_POD=$(kubectl get pods -l outpostid=9999 -o jsonpath='{.items[0].metadata.name}')
 BACKUP_POD=$(kubectl get pods -l app=empire-backup -o jsonpath='{.items[0].metadata.name}')
 
-#generate traffic
+# generate traffic
 
 echo "producing messages"
-kubectl exec $HQ_POD sh -- -c "echo “Happy 40th Birthday to General Tagge” | ./kafka-produce.sh --topic empire-announce"
-kubectl exec $HQ_POD sh -- -c "echo “deathstar plans v3” | ./kafka-produce.sh --topic deathstar-plans"
+kubectl exec "$HQ_POD" -- sh -c 'echo "Happy 40th Birthday to General Tagge" | ./kafka-produce.sh --topic empire-announce'
+kubectl exec "$HQ_POD" -- sh -c 'echo "deathstar plans v3" | ./kafka-produce.sh --topic deathstar-plans'
 
 echo "consuming messages"
 
-kubectl exec $OUTPOST_9999_POD sh -- -c "./kafka-consume.sh --topic empire-announce --from-beginning --max-messages 1"
-kubectl exec $OUTPOST_8888_POD sh -- -c "./kafka-consume.sh --topic empire-announce --from-beginning --max-messages 1"
-kubectl exec $BACKUP_POD sh -- -c "./kafka-consume.sh --topic deathstar-plans --from-beginning --max-messages 1"
-
+kubectl exec "$OUTPOST_9999_POD" -- sh -c './kafka-consume.sh --topic empire-announce --from-beginning --max-messages 1'
+kubectl exec "$OUTPOST_8888_POD" -- sh -c './kafka-consume.sh --topic empire-announce --from-beginning --max-messages 1'
+kubectl exec "$BACKUP_POD" -- sh -c './kafka-consume.sh --topic deathstar-plans --from-beginning --max-messages 1'