Comment 1 for bug 1666818

Find a solution.
My keystone use ldap, the user's UUID is not 32-bit.
So gnocchi recognized the illegal parameters.

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    user_id = headers.get("X-User-Id")
    if user_id:
        try:
            user_id = six.text_type(uuid.UUID(user_id))
        except Exception:
            abort(400, "Malformed X-User-Id")

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