Checks that minimum specified disk space is available an raises an error if it isnt.
| Key | Value(s) | Description | 
|---|---|---|
| method | "CheckDiskSpace" | |
| location | "directory location" | |
| required | "GBrequired" | |
| project | 
{Explanation}
{
  "method": "CheckDiskSpace",
  "location": "%REPOS%",
  "required": "1000",   //GB
  "project": "Demo" 
}