Drop JAF dependency from MediaTypeFactory

This commit drops the Java Activation Framework dependency from the
MediaTypeFactory, in favor of parsing our own `mime.types` file, which
was obtained from Apache HTTPD.

Issue: SPR-14908

spring-web/src/test/java/org/springframework/http/MediaTypeFactoryTests.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Arjen Poutsma
+ */
+public class MediaTypeFactoryTests {
+
+	@Test
+	public void getMediaType() {
+		assertEquals(MediaType.APPLICATION_XML, MediaTypeFactory.getMediaType("file.xml"));
+		assertEquals(MediaType.parseMediaType("application/javascript"), MediaTypeFactory.getMediaType("file.js"));
+		assertEquals(MediaType.parseMediaType("text/css"), MediaTypeFactory.getMediaType("file.css"));
+	}
+
+}