[RR2] Resetter plugin

[wolfy-j]

Is your feature request related to a problem? Please describe.
The service must collect all Resettable plugins and trigger Reset via RPC call and CLI command:

type Resetter inteface {
    Reset() error
}

Describe the solution you'd like
Plugin must collect all named and resettable services and allow them to perform folllowing RPC commands.

reset.Reset(name) error
reset.ResetAll() error

Need to add cli command:

To reset all services:

$ roadrunner reset
$ Resetting [http, jobs, temporal]... done

To reset specific service:

$ roadrunner reset http
$ Resetting http... done