Support JSPs in Embedded Jetty

JSPs are now supported in executable WARs with embedded Jetty.

Fixes gh-367
Closes gh-5290

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/java/sample/jetty/jsp/MyException.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2012-2016 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 sample.jetty.jsp;
+
+public class MyException extends RuntimeException {
+
+	public MyException(String message) {
+		super(message);
+	}
+
+}