Updated openstack/openstack
Project: openstack/oslo.messaging  2b6e24f81b7e6b040d5fad8bdabbaf7050cfbaf5

fix memory leak for function _safe_log

In _safe_log it uses recursive closure. The gc can not free stack for
this recursive closure for cycle-reference. So cut down the cycle
to fix it.

Resolved-bug: #1365892
Change-Id: I05fbd7091b886344d76b172a5ad66d9225599d69