message: test: use fewer blocks in wallet_groups and move sync call
  generate 101 blocks instead of 110
  move a sync_all call into the loop so that fewer blocks are
  synced on each call to hopefully see fewer timeouts
diff: @@ -31,7 +31,7 @@ class WalletGroupTest(BitcoinTestFramework):
  def run_test(self):
  self.log.info("Setting up")
  # Mine some coins
  - self.nodes[0].generate(110)
  + self.nodes[0].generate(101)
  # Get some addresses from the two nodes
  addr1 = [self.nodes[1].getnewaddress() for _ in range(3)]
  @@ -160,7 +160,6 @@ class WalletGroupTest(BitcoinTestFramework):
  signed_tx = self.nodes[0].signrawtransactionwithwallet(funded_tx['hex'])
  self.nodes[0].sendrawtransaction(signed_tx['hex'])
  self.nodes[0].generate(1)
  -
  self.sync_all()
  # Check that we can create a transaction that only requires ~100 of our
  