test: make explicit returned stdlib types in tests

[alexgrad42]

Fixes #600

No more primitive return types in tests

$  grep -rn 'let _ = .*node\.client' . --exclude-dir=target | awk -F'node.client.' '{print $2}' | awk -F'(' '{print $1}' | sort -u | xargs -I {} grep -rnE 'fn[[:space:]]+{}' .  --exclude-dir=target
./client/src/client_sync/v17/hidden.rs:20:            pub fn estimate_raw_fee(&self, conf_target: u32) -> Result<EstimateRawFee> {
./client/src/client_sync/v17/generating.rs:17:            pub fn generate_to_address(
./client/src/client_sync/v26/mining.rs:17:            pub fn get_prioritised_transactions(&self) -> Result<GetPrioritisedTransactions> {
./client/src/client_sync/v18/control.rs:15:            pub fn get_rpc_info(&self) -> Result<GetRpcInfo> { self.call("getrpcinfo", &[]) }
./client/src/client_sync/v17/wallet.rs:180:            pub fn new_address(&self) -> Result<bitcoin::Address> {
./client/src/client_sync/v17/wallet.rs:187:            pub fn new_address_with_type(&self, ty: AddressType) -> Result<bitcoin::Address> {
./client/src/client_sync/v17/wallet.rs:195:            pub fn new_address_with_label(
./client/src/client_sync/v17/wallet.rs:195:            pub fn new_address_with_label(
./client/src/client_sync/v17/wallet.rs:187:            pub fn new_address_with_type(&self, ty: AddressType) -> Result<bitcoin::Address> {
./client/src/client_sync/v17/raw_transactions.rs:180:            pub fn send_raw_transaction(
./client/src/client_sync/v17/wallet.rs:579:            pub fn send_to_address(
./client/src/client_sync/v17/wallet.rs:589:            pub fn send_to_address_rbf(
$

[jamillambert]

One nit, the rest is good.

[jamillambert]

Suggested change

	let _ : u32 = node.client.uptime().unwrap();
	let _: u32 = node.client.uptime().unwrap();

[jamillambert]

Just ran CI and the formatter also picked this up

[alexgrad42]

Fixed
Checking formatting...
$ cargo fmt -p bitcoind -p corepc-client -p jsonrpc -p bitreq -p corepc-types -p jsonrpc-fuzz --check
Formatting check passed

[jamillambert]

ACK 60c493d

Thanks