Persist error response data in TheHiveError

[Kamforka]

This one is a convenience feature to better handle exceptions due to API errors.

At the moment one only has access to the parsed error message of an exception, e.g.:

try:
    ...
except TheHiveError as err:
    if "CreateError" in str(err):
        print("handle create errors here")
    else:
        print("do generic error handling here")

From the above it is clear that the handling capabilities are limited to the parsed error string, while with this change one can do:

try:
    ...
except TheHiveError as err:
    if "CreateError" in err.message:
        print("handle create errors here")
    else:
        if err.response:
            if err.response.status_code == 401:
                print("handle authentication error here")
            else:
                # do anything generic with the error response here
                error_json = err.response.json()