Instead of requiring the each proxy handler to handle the webSocket
connection closure. On error the worker handler will appropriately
close the connection and event any errors.
* refactor(worker): Move tcp_proxy into its own package
This refactors:
- the tcp_proxy.go into worker/proxy/tcp
- add a missing unit test for the HandleTcpProxyV1
- refactors session.go into worker/session, needed to avoid import cycle
- adds a baseline for a mock controller session client
- go lint fixes
* Add sleep between spinning listener goroutine and dialing
Co-authored-by: Jeff Mitchell <jeffrey.mitchell@gmail.com>