test: fix intermittent failure in p2p_compactblocks_hb.py

As a result of node1 receiving a block, it sends out
SENDCMPCT messages to its peers to update the status.
We need to wait until those are received and
processed by the peers to avoid intermittent failures.

Author: mzumsande

test/functional/p2p_compactblocks_hb.py

@@ -32,10 +32,15 @@ def relay_block_through(self, peer):
         self.connect_nodes(peer, 0)
         self.generate(self.nodes[0], 1)
         self.disconnect_nodes(peer, 0)
-        status_to = [self.peer_info(1, i)['bip152_hb_to'] for i in range(2, 6)]
-        status_from = [self.peer_info(i, 1)['bip152_hb_from'] for i in range(2, 6)]
-        assert_equal(status_to, status_from)
-        return status_to
+
+        def status_to():
+            return [self.peer_info(1, i)['bip152_hb_to'] for i in range(2, 6)]
+
+        def status_from():
+            return [self.peer_info(i, 1)['bip152_hb_from'] for i in range(2, 6)]
+
+        self.wait_until(lambda: status_to() == status_from())
+        return status_to()
 
     def run_test(self):
         self.log.info("Testing reserved high-bandwidth mode slot for outbound peer...")