lxd: Wake up on initial startup

[stgraber]

This allows for LXD to perform its initial startup, generate certificate, ... prior to MicroCloud needing it, making the bootstrap process much faster on slow systems.

[stgraber]

@masnax kinda felt like I should have put something in lxd.go instead but wasn't sure of what exactly as I didn't want to have to instantiate a new object just to call this. Anyway, improvements welcome ;)

[masnax]

Seems like the right place to put it. If you want, you can accomplish the same thing through the MicroCloud proxy by adding a method to LXDService

func (s *LXDService) GetServer() (api.Server, error) {
	c, err := s.client("")
	if err != nil {
		return err
	}

       return c.GetServer()
}

and you’d call it with

resources, err := s.Services[types.LXD].(*service.LXDService).GetServer()

Or you could always just make LXDService.client() exportable.