lastidnotfound step 2: (#1300)

lastidnotfound step 2:
  * move "record stage", aka poh_service into banking stage
  * remove Entry.has_more, is incompatible with leader rotation
  * rewrite entry_next_hash in terms of Poh
  * simplify and unify transaction hashing (no embedded nulls)
  * register_last_entry from banking stage, fixes #1171 (w00t!)
  * new PoH doesn't generate empty ledger entries, so some fixes necessary in 
         multinode tests that rely on that (e.g. giving validators airdrops)
  * make window repair less patient, if we've been waiting for an answer, 
          don't be shy about most recent blobs
   * delete recorder and record stage
   * make more verbost  thin_client error reporting
   * more tracing in window (sigh)

src/mint.rs

@@ -57,8 +57,8 @@ impl Mint {
     }
 
     pub fn create_entries(&self) -> Vec<Entry> {
-        let e0 = Entry::new(&self.seed(), 0, vec![], false);
-        let e1 = Entry::new(&e0.id, 0, self.create_transactions(), false);
+        let e0 = Entry::new(&self.seed(), 0, vec![]);
+        let e1 = Entry::new(&e0.id, 0, self.create_transactions());
         vec![e0, e1]
     }
 }