It's _log, not log and we don't need the undefined variable prefix
It's _log, not log and we don't need the undefined variable prefix

Fixes a bug introduced in:
https://github.com/ManageIQ/manageiq/commit/18ffca974186192cb60015bcb1a03db2d71d6b0f

Note, this shouldn't be fatal since we're just losing a log message.
The next line is exiting the Thread anyway.

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