Fix Switch to use Akka.Tools.AtomicBoolean

This was due to me @hcanber adding Tools.AtomicBoolean and not seeing @rogeralsing just added one too.
Merge pull request #155 from HCanber/dev

Fix Switch to use Akka.Tools.AtomicBoolean

This was due to me @hcanber adding Tools.AtomicBoolean and not seeing @rogeralsing just added one too.