* Add recent_blockhash to requestAirdrop * Move tx confirmation to separate method * Add RpcClient airdrop methods * Request cli airdrop via RpcClient * Pass optional faucet_addr into TestValidator and fix tests * Update client/src/rpc_client.rs Co-authored-by: Michael Vines <mvines@gmail.com> Co-authored-by: Michael Vines <mvines@gmail.com>