[#109] services/policer: Assign tasks to Replicator

Make Policer to call AddTask method of Replicator when an insufficient
number of copies of an object is detected in the container.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/policer/policer.go

@@ -9,6 +9,7 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/network"
 	headsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/head"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object_manager/placement"
+	"github.com/nspcc-dev/neofs-node/pkg/services/replicator"
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
 	"go.uber.org/zap"
 )
@@ -42,6 +43,8 @@ type cfg struct {
 	remoteHeader *headsvc.RemoteHeader
 
 	localAddrSrc network.LocalAddressSource
+
+	replicator *replicator.Replicator
 }
 
 func defaultCfg() *cfg {
@@ -138,3 +141,10 @@ func WithLocalAddressSource(v network.LocalAddressSource) Option {
 		c.localAddrSrc = v
 	}
 }
+
+// WithReplicator returns option to set object replicator of Policer.
+func WithReplicator(v *replicator.Replicator) Option {
+	return func(c *cfg) {
+		c.replicator = v
+	}
+}