End-to-end Test - Ryu-OpenFlow:

    - LOOP_COUNTER=0

    - >

      echo "Waiting for Ryu to be ready..."

      until curl -s http://172.254.252.10:8080/ > /dev/null ; do

      while ! curl -s 'http://172.254.252.10:8080/'; do

        echo "Attempt: $LOOP_COUNTER"

        sleep 5;

        LOOP_COUNTER=$((LOOP_COUNTER + 1))