Split the two command implementations into separate libraries (#2012)

This will allow us at the user code side to determine to include old commands, new commands or both.

wpilibNewCommands/src/test/java/edu/wpi/first/wpilibj2/MockHardwareExtension.java

@@ -0,0 +1,40 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2016-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+package edu.wpi.first.wpilibj2;
+
+import org.junit.jupiter.api.extension.BeforeAllCallback;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
+
+import edu.wpi.first.hal.HAL;
+import edu.wpi.first.hal.sim.DriverStationSim;
+
+public final class MockHardwareExtension implements BeforeAllCallback {
+  private static ExtensionContext getRoot(ExtensionContext context) {
+    return context.getParent().map(MockHardwareExtension::getRoot).orElse(context);
+  }
+
+  @Override
+  public void beforeAll(ExtensionContext context) {
+    getRoot(context).getStore(Namespace.GLOBAL).getOrComputeIfAbsent("HAL Initalized", key -> {
+      initializeHardware();
+      return true;
+    }, Boolean.class);
+  }
+
+  private void initializeHardware() {
+    HAL.initialize(500, 0);
+    DriverStationSim dsSim = new DriverStationSim();
+    dsSim.setDsAttached(true);
+    dsSim.setAutonomous(false);
+    dsSim.setEnabled(true);
+    dsSim.setTest(true);
+
+
+  }
+}