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

test/functional/wallet_groups.py

@@ -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)]
@@ -160,8 +160,7 @@ 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()
-        self.sync_all()
 
         # Check that we can create a transaction that only requires ~100 of our
         # utxos, without pulling in all outputs and creating a transaction that