lxd/daemon: Fix task mutex double unlock #13486
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Because we are storing the `task.Group` by value in `Daemon`, replacing it after the timeout re-initializes the Mutex, leaving it unlocked. If some task exceeds the timeout at just the right time, it will lock the old mutex and then unlock the new one, generating a panic. Fixes canonical#12540 Signed-off-by: Wesley Hershberger <wesley.hershberger@canonical.com>
Signed-off-by: Wesley Hershberger <wesley.hershberger@canonical.com>
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As described in #12540