This allows our tests, which all share a containerd instance, to be a
bit more isolated by setting the containerd namespaces to the generated
daemon ID's rather than the default namespaces.
This came about because I found in some cases we had test daemons
failing to start (really very slow to start) because it was (seemingly)
processing events from other tests.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
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