[#36] Add default capacity and price attributes

Default values for capacity and price will be 0, so storage node
won't be present in placement. Add these attributes if they are
not explicitly set up by user config.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-node/config.go

@@ -22,8 +22,6 @@ const (
 	cfgNodeKey             = "node.key"
 	cfgBootstrapAddress    = "node.address"
 	cfgNodeAttributePrefix = "node.attribute"
-	cfgNodeCapacity        = "node.capacity"
-	cfgNodePrice           = "node.price"
 
 	// config keys for cfgGRPC
 	cfgListenAddress = "grpc.endpoint"
@@ -101,8 +99,8 @@ type BootstrapType uint32
 type cfgNodeInfo struct {
 	bootType   BootstrapType
 	attributes []string
-	capacity   uint64
-	price      uint64
+	capacity   uint64 // default: 0
+	price      uint64 // default: 0
 }
 
 const (
@@ -149,8 +147,6 @@ func initCfg(path string) *cfg {
 		cfgNodeInfo: cfgNodeInfo{
 			bootType:   StorageNode,
 			attributes: readAttributes(viperCfg),
-			capacity:   viperCfg.GetUint64(cfgNodeCapacity),
-			price:      viperCfg.GetUint64(cfgNodePrice),
 		},
 	}
 }
@@ -179,8 +175,6 @@ func initViper(path string) *viper.Viper {
 func defaultConfiguration(v *viper.Viper) {
 	// fixme: all hardcoded private keys must be removed
 	v.SetDefault(cfgNodeKey, "Kwk6k2eC3L3QuPvD8aiaNyoSXgQ2YL1bwS5CP1oKoA9waeAze97s")
-	v.SetDefault(cfgNodeCapacity, "10")
-	v.SetDefault(cfgNodePrice, "10")
 	v.SetDefault(cfgBootstrapAddress, "") // address to bootstrap with
 
 	v.SetDefault(cfgMorphRPCAddress, "http://morph_chain.localtest.nspcc.ru:30333/")