Switch default dt to 5.05 ms

All new loops should be on the 5.05 ms cycle, so let's flip the default
and move old robots to explicitly specify 5 ms.

Change-Id: I2495baaf2beebb0315b068efad4e68e7eed73898
diff --git a/frc971/control_loops/python/angular_system.py b/frc971/control_loops/python/angular_system.py
index 2228231..a0a07d6 100755
--- a/frc971/control_loops/python/angular_system.py
+++ b/frc971/control_loops/python/angular_system.py
@@ -21,7 +21,7 @@
                  kalman_q_vel,
                  kalman_q_voltage,
                  kalman_r_position,
-                 dt=0.005):
+                 dt=0.00505):
         self.name = name
         self.motor = motor
         self.G = G
diff --git a/frc971/control_loops/python/linear_system.py b/frc971/control_loops/python/linear_system.py
index 042bd5c..fe8dd85 100755
--- a/frc971/control_loops/python/linear_system.py
+++ b/frc971/control_loops/python/linear_system.py
@@ -22,7 +22,7 @@
                  kalman_q_vel,
                  kalman_q_voltage,
                  kalman_r_position,
-                 dt=0.005):
+                 dt=0.00505):
         self.name = name
         self.motor = motor
         self.G = G