Re-adding ErrorJavaLevel class

Resurrecting class from history for proper deprecation workflow.

Author: jeremiahjstacey

src/main/java/org/owasp/esapi/logging/java/ESAPIErrorJavaLevel.java

@@ -0,0 +1,43 @@
+/**
+ * OWASP Enterprise Security API (ESAPI)
+ * 
+ * This file is part of the Open Web Application Security Project (OWASP)
+ * Enterprise Security API (ESAPI) project. For details, please see
+ * <a href="http://www.owasp.org/index.php/ESAPI">http://www.owasp.org/index.php/ESAPI</a>.
+ *
+ * Copyright (c) 2007 - The OWASP Foundation
+ * 
+ * The ESAPI is published by OWASP under the BSD license. You should read and accept the
+ * LICENSE before you use, modify, and/or redistribute this software.
+ * 
+ * @created 2019
+ */
+
+package org.owasp.esapi.logging.java;
+
+import java.util.logging.Level;
+
+/**
+ *  A custom logging level defined between Level.SEVERE and Level.WARNING in logger.
+ */
+public class ESAPIErrorJavaLevel extends Level {
+
+    protected static final long serialVersionUID = 1L;
+
+    /**
+     * Defines a custom error level below SEVERE but above WARNING since this level isn't defined directly
+     * by java.util.Logger already.
+     */
+    public static final Level ERROR_LEVEL = new ESAPIErrorJavaLevel( "ERROR", Level.SEVERE.intValue() - 1);
+
+    /**
+     * Constructs an instance of a JavaLoggerLevel which essentially provides a mapping between the name of
+     * the defined level and its numeric value.
+     * 
+     * @param name The name of the JavaLoggerLevel
+     * @param value The associated numeric value
+     */
+    private ESAPIErrorJavaLevel(String name, int value) {
+        super(name, value);
+    }
+}