message: tryin caching
diff: @@ -14,7 +14,7 @@ before_install:
  - export JAVA_HOME=/usr/lib/jvm/java-8-oracle
  - java -version
  - sudo rm -rf /var/lib/cassandra/*
  - - wget http://www.us.apache.org/dist/cassandra/3.9/apache-cassandra-3.9-bin.tar.gz && tar -xvzf apache-cassandra-3.9-bin.tar.gz
  + - if [ ! -d "apache-cassandra-3.9" ]; then wget http://www.us.apache.org/dist/cassandra/3.9/apache-cassandra-3.9-bin.tar.gz && tar -xvzf apache-cassandra-3.9-bin.tar.gz; fi
  - sudo sh ./apache-cassandra-3.9/bin/cassandra -R
  - sleep 20
  