[wpilibc] Rename SpeedControllerGroupTest.cpp (#4258)

Also move motor controller test files into motorcontrol folder to match
Java.

wpilibc/src/test/native/cpp/drive/DifferentialDriveTest.cpp

@@ -2,9 +2,9 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include "MockMotorController.h"
 #include "frc/drive/DifferentialDrive.h"
 #include "gtest/gtest.h"
+#include "motorcontrol/MockMotorController.h"
 
 TEST(DifferentialDriveTest, ArcadeDriveIK) {
   // Forward

wpilibc/src/test/native/cpp/drive/KilloughDriveTest.cpp

@@ -4,9 +4,9 @@
 
 #include <cmath>
 
-#include "MockMotorController.h"
 #include "frc/drive/KilloughDrive.h"
 #include "gtest/gtest.h"
+#include "motorcontrol/MockMotorController.h"
 
 TEST(KilloughDriveTest, CartesianIK) {
   frc::MockMotorController left;

wpilibc/src/test/native/cpp/drive/MecanumDriveTest.cpp

@@ -2,9 +2,9 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include "MockMotorController.h"
 #include "frc/drive/MecanumDrive.h"
 #include "gtest/gtest.h"
+#include "motorcontrol/MockMotorController.h"
 
 TEST(MecanumDriveTest, CartesianIK) {
   // Forward

wpilibc/src/test/native/cpp/motorcontrol/MockMotorController.cpp

@@ -2,7 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include "MockMotorController.h"
+#include "motorcontrol/MockMotorController.h"
 
 using namespace frc;
 

wpilibc/src/test/native/cpp/motorcontrol/MotorControllerGroupTest.cpp

@@ -7,8 +7,8 @@
 #include <memory>
 #include <vector>
 
-#include "MockMotorController.h"
 #include "gtest/gtest.h"
+#include "motorcontrol/MockMotorController.h"
 
 using namespace frc;