[#891] getSvc: Fix get range hash implementation

Get range can perform GET request, so this request must be done
from container node to not to get access denied error.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/services/object_manager/placement/traverser.go

@@ -181,6 +181,15 @@ func (x Node) PublicKey() []byte {
 	return x.key
 }
 
+// NewNode creates new Node.
+func NewNode(addresses network.AddressGroup, externalAddresses network.AddressGroup, key []byte) Node {
+	return Node{
+		addresses:         addresses,
+		externalAddresses: externalAddresses,
+		key:               key,
+	}
+}
+
 // Next returns next unprocessed address of the object placement.
 //
 // Returns nil if no nodes left or traversal operation succeeded.