dbfs delete operation api has `recursive` as compulsory argument

[bhadreshpsavani]

https://github.com/databricks/databricks-cli/blob/fd2ad70d1cbe03b587970a8f41d17004d453707c/databricks_cli/sdk/service.py#L919

It should be

def delete(self, path, recursive, headers=None): 

otherwise code will give error