Issue 50152 - Replace os.getenv('HOME') with os.path.expanduser
    
    Description: When HOME env var is not set, the call will fail with an exception.
    Instead of HOME we can use expanduser method. The expanduser will do the right thing
    and get home directory on all platforms from either env vars or password database.
    
    https://pagure.io/389-ds-base/issue/50152
    
    Reviewed by: mreynolds, wibrown (Thanks!)