Tuned shoulder actor for the new string length and reduced power when landed while hanging.

Change-Id: I85506f2fa7983494e560b62989bc5746b1ad7800
diff --git a/y2016/control_loops/superstructure/superstructure.h b/y2016/control_loops/superstructure/superstructure.h
index 0fb851a..eb16405 100644
--- a/y2016/control_loops/superstructure/superstructure.h
+++ b/y2016/control_loops/superstructure/superstructure.h
@@ -112,6 +112,7 @@
 
   static constexpr double kZeroingVoltage = 6.0;
   static constexpr double kShooterHangingVoltage = 6.0;
+  static constexpr double kShooterHangingLowVoltage = 2.0;
   static constexpr double kOperatingVoltage = 12.0;
   static constexpr double kLandingShoulderDownVoltage = -1.5;