[#73] pool: Add getters for NodeParam

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

pool/pool.go

@@ -1160,16 +1160,31 @@ func (x *NodeParam) SetPriority(priority int) {
 	x.priority = priority
 }
 
+// Priority returns priority of the node.
+func (x *NodeParam) Priority() int {
+	return x.priority
+}
+
 // SetAddress specifies address of the node.
 func (x *NodeParam) SetAddress(address string) {
 	x.address = address
 }
 
+// Address returns address of the node.
+func (x *NodeParam) Address() string {
+	return x.address
+}
+
 // SetWeight specifies weight of the node.
 func (x *NodeParam) SetWeight(weight float64) {
 	x.weight = weight
 }
 
+// Weight returns weight of the node.
+func (x *NodeParam) Weight() float64 {
+	return x.weight
+}
+
 // WaitParams contains parameters used in polling is a something applied on FrostFS network.
 type WaitParams struct {
 	timeout      time.Duration