Listener control without service restart

[martinkersner]

Description

This PR includes a new auxiliary service called watchman to every listener. watchman creates a REST API to control the state of listener. watchman allows to

• list all listeners for specific service
• list active listeners (currently listening)
• activate listener
• deactivate listener

Listener state can be controlled through the Orakl Network CLI

listener active --host ${host} --port ${port}
listener activate --host ${host} --port ${port} --id ${id}
listener deactivate --host ${host} --port ${port} --id ${id}

This PR additionally fixed #409

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Checklist before requesting a review

• I have performed a self-review of my code.

Deployment

• Should publish npm package
• Should publish Docker image