Adds iperf timeout for bandwith measurements.

measurement_main.py

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