Megatest: install.sh at [790604d640]

File mkdeploy/tests/helpers/install.sh artifact dc233ea2bc part of check-in 790604d640

#!/bin/bash -e
freespace=`df -k /$DIRECTORY | grep $DIRECTORY | awk '{print $4}'`
if [[ $freespace -lt $REQUIRED ]];then
  echo "ERROR: insufficient space on /$DIRECTORY"
  exit 1
else
  echo "There is adequate space on /$DIRECTORY"
fi