Adds a new handling for reconnects.

measurement_main.py

         print_message("Performing HARD reconnect...")
         try:
             if modem_serial_obj.is_open:
-                modem_serial_obj.write(b'at+COPS?\r\n')
+                modem_serial_obj.write(b'at+cfun=0"\r\n')
                 sleep(NR_SERIAL_RESPOND_TIME)
-                modem_serial_obj.write(b'AT+QENG="servingcell"\r\n')
+                sleep(2)
+                modem_serial_obj.write(b'at+cfun=1\r\n')
                 sleep(NR_SERIAL_RESPOND_TIME)
+                sleep(2)
+                os.system("/root/connect-modem.py -s")
+                sleep(5)
+                os.system("/root/connect-modem.py -l {}".format(provider))
         except:
             if not modem_serial_obj.is_open:
                 print_message("Serial port is closed.")