Comment 3 for bug 1782361

Reviewed: https://review.opendev.org/679312
Committed: https://git.openstack.org/cgit/openstack/oslo.log/commit/?id=b52c8cd247e9b185d176bfbc4c24c5a2cb35e5be
Submitter: Zuul
Branch: master

commit b52c8cd247e9b185d176bfbc4c24c5a2cb35e5be
Author: Vladyslav Drok <email address hidden>
Date: Fri Jul 20 14:17:43 2018 +0300

    Serialize complex objects in FluentFormatter

    This change introduces the serialization with basically json dumps,
    falling back to repr for non-serializable object. We check the types
    of the top level objects passed to the formatter, as for example
    an object enclosed into dictionary passed to the logger should be a
    much more rare case.

    Closes-Bug: 1782361
    Change-Id: Ib214f95abfadd91f85b6cce853057a572ec287f6