POST file data to a specific URI

Note that POST is not used for most web services URIs.  Instead,
PUT is used for creating resources.

def post(ctx, uri, input_file):
    """POST file data to a specific URI

Note that POST is not used for most web services URIs.  Instead,
PUT is used for creating resources.
    """
    http_client = get_wva(ctx).get_http_client()
    cli_pprint(http_client.post(uri, input_file.read()))