Fix treasury kept and spend when emptied (#3880)

* Now construct_runtime must include treasury config so account is created at genesis.
* if it doesn't though it is ok, account will be created when the amount put is more than existential deposit.

substrate/node/cli/src/chain_spec.rs

@@ -273,6 +273,7 @@ pub fn testnet_genesis(
 			authorities: vec![],
 		}),
 		membership_Instance1: Some(Default::default()),
+		treasury: Some(Default::default()),
 	}
 }
 

substrate/node/runtime/src/lib.rs

@@ -83,8 +83,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 183,
-	impl_version: 183,
+	spec_version: 184,
+	impl_version: 184,
 	apis: RUNTIME_API_VERSIONS,
 };
 
@@ -482,7 +482,7 @@ construct_runtime!(
 		TechnicalMembership: membership::<Instance1>::{Module, Call, Storage, Event<T>, Config<T>},
 		FinalityTracker: finality_tracker::{Module, Call, Inherent},
 		Grandpa: grandpa::{Module, Call, Storage, Config, Event},
-		Treasury: treasury::{Module, Call, Storage, Event<T>},
+		Treasury: treasury::{Module, Call, Storage, Config, Event<T>},
 		Contracts: contracts,
 		Sudo: sudo,
 		ImOnline: im_online::{Module, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},

substrate/node/testing/src/genesis.rs

@@ -96,5 +96,6 @@ pub fn config(support_changes_trie: bool, code: Option<&[u8]>) -> GenesisConfig
 		membership_Instance1: Some(Default::default()),
 		elections_phragmen: Some(Default::default()),
 		sudo: Some(Default::default()),
+		treasury: Some(Default::default()),
 	}
 }