Add support for Spring Rabbit (via Spring AMQP) to Boot

- If RabbitTemplate is on the classpath, turn on autodetection.
- Create a RabbitTemplate, a Rabbit ConnectionFactory, and a RabbitAdmin is spring.rabbitmq.dynamic:true
- Enable some **spring.rabbitmq** properties like host, port, username, password, and dynamic
- Add tests to verify functionality
- Add Groovy CLI functionality. Base it on @EnableRabbitMessaging. Add spring-amqp to the path.
- Create rabbit.groovy test to prove it all works.
- Make Queue and TopicExchange top-level Spring beans in rabbit.groovy test script

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/autoconfigure/RabbitCompilerAutoConfiguration.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-2013 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.boot.cli.compiler.autoconfigure;
+
+import org.codehaus.groovy.ast.ClassNode;
+import org.codehaus.groovy.control.CompilationFailedException;
+import org.codehaus.groovy.control.customizers.ImportCustomizer;
+import org.springframework.boot.cli.compiler.AstUtils;
+import org.springframework.boot.cli.compiler.CompilerAutoConfiguration;
+import org.springframework.boot.cli.compiler.DependencyCustomizer;
+
+import java.lang.annotation.*;
+
+/**
+ * {@link CompilerAutoConfiguration} for Spring Rabbit.
+ *
+ * @author Greg Turnquist
+ */
+public class RabbitCompilerAutoConfiguration extends CompilerAutoConfiguration {
+
+    @Override
+    public boolean matches(ClassNode classNode) {
+        // Slightly weird detection algorithm because there is no @Enable annotation for
+        // Integration
+        return AstUtils.hasAtLeastOneAnnotation(classNode, "EnableRabbitMessaging");
+    }
+
+    @Override
+    public void applyDependencies(DependencyCustomizer dependencies)
+            throws CompilationFailedException {
+        dependencies.add("org.springframework.amqp", "spring-rabbit",
+                dependencies.getProperty("spring-rabbit.version"));
+
+    }
+
+    @Override
+    public void applyImports(ImportCustomizer imports) throws CompilationFailedException {
+        imports.addStarImports("org.springframework.amqp.rabbit.core",
+                "org.springframework.amqp.rabbit.connection",
+                "org.springframework.amqp.rabbit.listener",
+                "org.springframework.amqp.rabbit.listener.adapter",
+                "org.springframework.amqp.core").addImports(EnableRabbitMessaging.class.getCanonicalName());
+    }
+
+    @Target(ElementType.TYPE)
+    @Documented
+    @Retention(RetentionPolicy.RUNTIME)
+    public static @interface EnableRabbitMessaging {
+
+    }
+
+
+}