Clean up ContainerStarter:
- Remove unnecessary snifferModule:Module argument. If at all this is required, ContainerStarter can find it out itself from the Sniffer object.
- Remove code that sets up containerHome - it's never used and we don't expect containers to be brought in this way as well.
Optimize Sniffer.setup. Multiple calls to setup of a sniffer is now a no-op as opposed to a call to module system.