test: Add mempool_updatefromblock.py

test/functional/test_runner.py

@@ -90,6 +90,7 @@ BASE_SCRIPTS = [
     'p2p_segwit.py',
     'p2p_timeouts.py',
     'p2p_tx_download.py',
+    'mempool_updatefromblock.py',
     'wallet_dump.py',
     'wallet_listtransactions.py',
     # vv Tests less than 60s vv