Solve slow, backwards trajectories

We were not searching far enough to learn that you are best of steering
aggressively from the start.  Extend the horizon far enough to discover
that.

Change-Id: I530f59169680c52ca0a389d6673cdaf626d98270
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/frc971/control_loops/swerve/casadi_velocity_mpc.py b/frc971/control_loops/swerve/casadi_velocity_mpc.py
index d108931..620d7ec 100644
--- a/frc971/control_loops/swerve/casadi_velocity_mpc.py
+++ b/frc971/control_loops/swerve/casadi_velocity_mpc.py
@@ -58,7 +58,7 @@
                                 casadi.SX.sym("U", 8, 1)) for i in range(4)
         ]
 
-        self.N = 50
+        self.N = 200
 
         # Start with an empty nonlinear program.
         self.w = []