Bugfix: Read state from sysfs.

measurement_main.py

                 "cat /sys/module/tcp_cubic/parameters/hystart", shell=True
             )
         )
-        == "1"
+        == 1
     )
 
 
                 "cat /sys/kernel/debug/tracing/events/tcp/tcp_probe/enable", shell=True
             )
         )
-        == "1"
+        == 1
     )