improve test reliability

wait-for-kafka.sh sometimes infinitely loops because curl gets
correct response but fails with Connection reset by peer
+ curl http://kafka:9099/
TOPICS READY
curl: (56) Recv failure: Connection reset by peer

Author: MichaelMraka

dev/scripts/wait-for-kafka.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-until curl -s $KAFKA_READY_ADDRESS >/dev/null ; do
+until [[ "$(curl -s $KAFKA_READY_ADDRESS)" == "TOPICS READY" ]] ; do
   >&2 echo "Kafka topics not ready yet"
   sleep 1
 done

scripts/go_test_on_ci.sh

@@ -15,5 +15,13 @@ set -e -o pipefail
 golangci-lint run --timeout 5m
 echo "Go code analysed successfully."
 
+if [[ -n $DB_HOST ]] ; then
+    ./dev/scripts/wait-for-services.sh
+fi
+
+if [[ -n $KAFKA_READY_ADDRESS ]] ; then
+   ./dev/scripts/wait-for-kafka.sh
+fi
+
 # Run project tests
 ./scripts/go_test_db.sh | ./scripts/colorize.sh