Pass Context to the Run Method of a Runner

[pavelbrm]

This PR contains an important update to the daemon.Runner interface.

Since now, the Run method expects a mandatory context as an argument.

The reason for this change is that a service implementing the Runner interface needs a way to listen to the Done channel of a context, derived from the daemon's root context.
Until before now it was possible by:

• creating a daemon instance
• then getting a context from it by Ctx
• and then by supplying the context to the service

With this change, a context will be automatically passed in to the Run method of the service.