Block consensus encoding and decoding does not work

[SWvheerden]

Add the following test the block.rs, it should work:

#[cfg(test)]
mod test {
    use super::*;
    use crate::blocks::genesis_block::get_genesis_block;
    use crate::consensus::{ConsensusDecoding};
    use tari_common::configuration::Network;

    #[test]
    fn block_encode_decode(){
        let block = get_genesis_block(Network::LocalNet).block().clone();
        let mut block_bytes = Vec::new();
        block.consensus_encode(&mut block_bytes).unwrap();
        let decoded_block =  Block::consensus_decode(&mut block_bytes.as_slice()).unwrap();
        assert_eq!(block, decoded_block);

    }
}