Samuel Merritt 43ace3c628 Make RingBuilders deep-copy-able
We used to be able to deep-copy RingBuilder objects, but the addition
of debug logging (8d3b3b2) broke that since you can't deep-copy a
Python logger. This commit fixes that.

Swift doesn't really deep-copy RingBuilders anywhere, but third-party
code might.

Change-Id: If8bdadd93d9980db3d8a093f32d76ca604de9301
2015-04-22 15:35:32 -07:00
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