Add first leader to genesis (#1681)

* Add first leader to genesis entries, consume in genesis.sh

* Set bootstrap leader in the bank on startup, remove instantiation of bootstrap leader from bin/fullnode

* Remove need to initialize bootstrap leader in leader_scheduler, now can be read from genesis entries

* Add separate interface new_with_leader() in mint for creating genesis leader entries

src/packet.rs

@@ -378,9 +378,11 @@ impl Blob {
                     }
                     return Err(Error::IO(e));
                 }
-                Ok(()) => if i == 0 {
-                    socket.set_nonblocking(true)?;
-                },
+                Ok(()) => {
+                    if i == 0 {
+                        socket.set_nonblocking(true)?;
+                    }
+                }
             }
             v.push(r);
         }