Enable elastic scaling node feature in local testnets genesis (#3509)

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

polkadot/node/service/Cargo.toml

@@ -93,6 +93,7 @@ kvdb-rocksdb = { version = "0.19.0", optional = true }
 parity-db = { version = "0.4.12", optional = true }
 codec = { package = "parity-scale-codec", version = "3.6.1" }
 parking_lot = "0.12.1"
+bitvec = { version = "1.0.1", optional = true }
 
 # Polkadot
 polkadot-core-primitives = { path = "../../core-primitives" }
@@ -184,8 +185,8 @@ full-node = [
 ]
 
 # Configure the native runtimes to use.
-westend-native = ["westend-runtime", "westend-runtime-constants"]
-rococo-native = ["rococo-runtime", "rococo-runtime-constants"]
+westend-native = ["bitvec", "westend-runtime", "westend-runtime-constants"]
+rococo-native = ["bitvec", "rococo-runtime", "rococo-runtime-constants"]
 
 runtime-benchmarks = [
 	"frame-benchmarking-cli/runtime-benchmarks",

polkadot/node/service/src/chain_spec.rs

@@ -122,7 +122,9 @@ pub fn wococo_config() -> Result<RococoChainSpec, String> {
 fn default_parachains_host_configuration(
 ) -> polkadot_runtime_parachains::configuration::HostConfiguration<polkadot_primitives::BlockNumber>
 {
-	use polkadot_primitives::{AsyncBackingParams, MAX_CODE_SIZE, MAX_POV_SIZE};
+	use polkadot_primitives::{
+		vstaging::node_features::FeatureIndex, AsyncBackingParams, MAX_CODE_SIZE, MAX_POV_SIZE,
+	};
 
 	polkadot_runtime_parachains::configuration::HostConfiguration {
 		validation_upgrade_cooldown: 2u32,
@@ -155,6 +157,9 @@ fn default_parachains_host_configuration(
 			max_candidate_depth: 3,
 			allowed_ancestry_len: 2,
 		},
+		node_features: bitvec::vec::BitVec::from_element(
+			1u8 << (FeatureIndex::ElasticScalingMVP as usize),
+		),
 		scheduler_params: SchedulerParams {
 			lookahead: 2,
 			group_rotation_frequency: 20,