added retries to the spring tests
added retries to the spring tests

kimonocloud/natsu-buildpack-java,wishtack/heroku-buildpack-java,heroku/heroku-buildpack-java,neilgandhi/heroku-buildpack-java,hpcloud/heroku-buildpack-java,RaymondKroon/heroku-buildpack-vertx,Scalingo/java-buildpack,JIoJIaJIu/heroku-buildpack-java,Vincit/heroku-buildpack-java-nodejs,bluebreezecf/heroku-buildpack-java,Vincit/heroku-buildpack-java-nodejs,franciscocpg/heroku-buildpack-java,franciscocpg/heroku-buildpack-java,Parlio/heroku-buildpack-java,noncreativetype/sms,neilgandhi/heroku-buildpack-java,JIoJIaJIu/heroku-buildpack-java,hpcloud/heroku-buildpack-java,noncreativetype/sms,noncreativetype/sms,bluebreezecf/heroku-buildpack-java,Parlio/heroku-buildpack-java,RaymondKroon/heroku-buildpack-vertx,wishtack/heroku-buildpack-java,Scalingo/java-buildpack,kimonocloud/natsu-buildpack-java,heroku/heroku-buildpack-java