Print stdout on Memgraph termination

tests/stress/continuous_integration

@@ -112,6 +112,8 @@ def start_memgraph(args: Args, memgraph_options: List[str]) -> Popen:
 
 def stop_memgraph(proc_mg: Popen) -> None:
     proc_mg.terminate()
+    for line in iter(proc_mg.stdout.readline, ""):
+        print(line)
     ret_mg = proc_mg.wait()
     if ret_mg != 0:
         raise Exception("Memgraph binary returned non-zero ({})!".format(ret_mg))
@@ -144,6 +146,7 @@ def run_test(args: Args, test: str, options: List[str], timeout: int, mode: Data
         ]
         + options
     )
+    print("Executing command '{}'".format(" ".join(cmd)))
     start = time.time()
     ret_test = subprocess.run(cmd, cwd=SCRIPT_DIR, timeout=timeout * 60)