Adds iperf timeout for bandwith measurements.

measurement_main.py

                     self.config["server"],
                     self.config["port"],
                 )
-                try:
-                    subprocess.call(iperf_command, timeout=float(time) + 1 + TIMEOUT_OFFSET)
-                except:
-                    print_message("iPerf timed out. Going ahead with next measurement...")
+                is_measurement_done = False
+                while not is_measurement_done:
+                    try:
+                        subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
+                        is_measurement_done = True
+                    except:
+                        print_message("iPerf timed out. Retry...")
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     tcp_algo
                     str(self.config["port"]),
                     "--one-off",
                 ]
-                try:
-                    subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
-                except:
-                    print_message("iPerf timed out. Going ahead with next measurement...")
+                is_measurement_done = False
+                while not is_measurement_done:
+                    try:
+                        subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
+                        is_measurement_done = True
+                    except:
+                        print_message("iPerf timed out. Retry...")
                 sleep(2)
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     "-C",
                     tcp_algo[congestion_control_index],
                 ]
-                try:
-                    subprocess.call(iperf_command, timeout=float(time) + 2 + TIMEOUT_OFFSET)
-                except:
-                    print_message("iPerf timed out. Going ahead with next measurement...")
+                is_measurement_done = False
+                while not is_measurement_done:
+                    try:
+                        subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
+                        is_measurement_done = True
+                    except:
+                        print_message("iPerf timed out. Retry...")
                 sleep(4)
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     self.config["port"],
                 )
                 sleep(2)
-                try:
-                    subprocess.call(iperf_command, timeout=float(time)+ 2 + TIMEOUT_OFFSET)
-                except:
-                    print_message("iPerf timed out. Going ahead with next measurement...")
+                is_measurement_done = False
+                while not is_measurement_done:
+                    try:
+                        subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
+                        is_measurement_done = True
+                    except:
+                        print_message("iPerf timed out. Retry...")
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     tcp_algo