[tests] functional test for createmultisig RPC

test/functional/test_runner.py

@@ -113,6 +113,7 @@ BASE_SCRIPTS = [
     'mining_prioritisetransaction.py',
     'p2p_invalid_block.py',
     'p2p_invalid_tx.py',
+    'rpc_createmultisig.py',
     'feature_versionbits_warning.py',
     'rpc_preciousblock.py',
     'wallet_importprunedfunds.py',