scripted-diff: use self.sync_* methods

-BEGIN VERIFY SCRIPT-
sed -i -e 's/sync_blocks(self.nodes)/self.sync_blocks()/g'     $(git grep -l 'sync_blocks(self.nodes)'   ./test/functional/*.py)
sed -i -e 's/sync_mempools(self.nodes)/self.sync_mempools()/g' $(git grep -l 'sync_mempools(self.nodes)' ./test/functional/*.py)

sed -i -e 's/  sync_blocks(/  self.sync_blocks(/g'     $(git grep -l sync_blocks   ./test/functional/*.py)
sed -i -e 's/  sync_mempools(/  self.sync_mempools(/g' $(git grep -l sync_mempools ./test/functional/*.py)
-END VERIFY SCRIPT-

test/functional/wallet_listreceivedby.py

@@ -24,7 +24,7 @@ class ReceivedByTest(BitcoinTestFramework):
     def run_test(self):
         # Generate block to get out of IBD
         self.nodes[0].generate(1)
-        sync_blocks(self.nodes)
+        self.sync_blocks()
 
         # save the number of coinbase reward addresses so far
         num_cb_reward_addresses = len(self.nodes[1].listreceivedbyaddress(minconf=0, include_empty=True, include_watchonly=True))