Standardize on 'use log::*' for easy access to all log level macros

drone/src/bin/drone.rs

@@ -1,5 +1,5 @@
 use clap::{crate_version, App, Arg};
-use log::info;
+use log::*;
 use solana_drone::drone::{Drone, DRONE_PORT};
 use solana_drone::socketaddr;
 use solana_sdk::signature::read_keypair;

drone/src/drone.rs

@@ -7,7 +7,7 @@
 use bincode::{deserialize, serialize};
 use byteorder::{ByteOrder, LittleEndian};
 use bytes::{Bytes, BytesMut};
-use log::{debug, info, trace, warn};
+use log::*;
 use serde_derive::{Deserialize, Serialize};
 use solana_metrics;
 use solana_metrics::influxdb;