cg: Check for name= prefix in controller, not cgset
cg: Check for name= prefix in controller, not cgset

This should be symmetrical with cg dirs creation.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>
Acked-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>

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