Fix main function initialization (#1176)

I don't have a good way to ensure this always works, so this is going to be a documentation issue.
But initializeHardwareConfiguration is now reentrant, so we can just have all tests call it.

hal/src/main/java/edu/wpi/first/wpilibj/util/BaseSystemNotInitializedException.java

@@ -1,36 +0,0 @@
-/*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 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.wpilibj.util;
-
-
-/**
- * Thrown if there is an error caused by a basic system or setting not being properly initialized
- * before being used.
- */
-public class BaseSystemNotInitializedException extends RuntimeException {
-  /**
-   * Create a new BaseSystemNotInitializedException.
-   *
-   * @param message the message to attach to the exception
-   */
-  public BaseSystemNotInitializedException(String message) {
-    super(message);
-  }
-
-  /**
-   * Create a new BaseSystemNotInitializedException using the offending class that was not set and
-   * the class that was affected.
-   *
-   * @param offender The class or interface that was not properly initialized.
-   * @param affected The class that was was affected by this missing initialization.
-   */
-  public BaseSystemNotInitializedException(Class<?> offender, Class<?> affected) {
-    super("The " + offender.getSimpleName() + " for the " + affected.getSimpleName()
-        + " was never set.");
-  }
-}