use another way to implement travis_wait (#401)

.travis.yml

@@ -19,7 +19,7 @@ jobs:
         - sudo apt-get install azure-cli
         # - az --help
         # - chmod +x install.sh && ./install.sh
-        - travis_wait 30 set -o pipefail && mvn -P travis-ci-test clean cobertura:cobertura-integration-test | grep -v "DEBUG"
+        - chmod +x ./src/libs/travis-wait-mvn-build.sh && ./src/libs/travis-wait-mvn-build.sh
         - bash <(curl -s https://codecov.io/bash)
     - stage: performance-test
       script:

src/libs/travis-wait-mvn-build.sh

@@ -0,0 +1,9 @@
+function write_visual_bells() {
+  while true; do
+    echo -en "\a"
+    sleep 10
+  done
+}
+write_visual_bells&
+
+set -o pipefail && mvn -P travis-ci-test clean cobertura:cobertura-integration-test | grep -v "DEBUG"