[Floonet] add feature for height locked kernels (#2168)

* add feature for height locked kernels

* add function to compute kernel features appropriate for lock height, and use it

* only sign kernel-features relevant fields; refactor Features

* simplify invalid kernel logic

* remove unused height arg to reward::output and run some rustfmt

* replace nested if/else by match

wallet/src/test_framework/mod.rs

@@ -45,8 +45,8 @@ pub use self::{testclient::LocalWalletClient, testclient::WalletProxy};
 /// Get an output from the chain locally and present it back as an API output
 fn get_output_local(chain: &chain::Chain, commit: &pedersen::Commitment) -> Option<api::Output> {
 	let outputs = [
-		OutputIdentifier::new(OutputFeatures::DEFAULT_OUTPUT, commit),
-		OutputIdentifier::new(OutputFeatures::COINBASE_OUTPUT, commit),
+		OutputIdentifier::new(OutputFeatures::PLAIN, commit),
+		OutputIdentifier::new(OutputFeatures::COINBASE, commit),
 	];
 
 	for x in outputs.iter() {