fa865efa4a qa: Fix wallet_listreceivedby race (MarcoFalke)
Pull request description:
Generating a block on node 0 will only get node 0 out of IBD and not node 1. So the inv for the `txid` is dropped by node 1 and the call to `sync_all` fails. Solve it by a call to `sync_blocks` after `generate`.
Tree-SHA512: e21b01a9e8c90bd6a3aad290c97cc4866ab384e22797b318eed55ae2767512203597d3a184b23ad5a3fe76bdbb8a3d5c51e097d56b160232851164434059ff23
Backport of Core PR13304
https://github.com/bitcoin/bitcoin/pull/13304/