message: amazon: minor error check change
diff: printf "\tExiting now.\n\n"
  exit;
  fi
  - if [ $? -ne 0 ]; then
  - printf "\tUnable to download MongoDB at this time.\n"
  - printf "\tExiting now.\n\n"
  - exit;
  - fi
  tar xf mongodb-linux-x86_64-amazon-3.6.3.tgz
  rm -f mongodb-linux-x86_64-amazon-3.6.3.tgz
  ln -s mongodb-linux-x86_64-amazon-3.6.3/ mongodb
  