AMQP-531: Log4j2 AmqpAppender

JIRA: https://jira.spring.io/browse/AMQP-531

Initial Commit.

Add Properties Test

Polishing

Move the log4j2 Appender back to spring-rabbit - my concern about
log4j and log4j2 on the classpath were unfounded.

* Polishing according PR comments

build.gradle

@@ -79,12 +79,14 @@ subprojects { subproject ->
 
 	ext {
 		cglibVersion = '3.1'
+		commonsCliVersion = '1.2'
 		commonsIoVersion = '2.4'
 		hamcrestVersion = '1.3'
 		jacksonVersion = '1.9.13'
 		jackson2Version = '2.3.2'
 		junitVersion = '4.11'
 		log4jVersion = '1.2.17'
+		log4j2Version = '2.4.1'
 		logbackVersion = '1.1.2'
 		mockitoVersion = '1.9.5'
 		rabbitmqVersion = project.hasProperty('rabbitmqVersion') ? project.rabbitmqVersion : '3.6.0'
@@ -214,8 +216,6 @@ project('spring-rabbit') {
 
 		compile "org.springframework.retry:spring-retry:$springRetryVersion"
 
-		testCompile "commons-cli:commons-cli:1.2"
-
 		compile ("log4j:log4j:$log4jVersion") { dep ->
 			optional dep
 			exclude group: 'javax.jms', module: 'jms'
@@ -225,6 +225,10 @@ project('spring-rabbit') {
 
 		compile ("ch.qos.logback:logback-classic:$logbackVersion", optional)
 
+		compile ("org.apache.logging.log4j:log4j-core:$log4j2Version", optional)
+
+		testCompile "commons-cli:commons-cli:$commonsCliVersion"
+
 	}
 
 }

settings.gradle

@@ -3,4 +3,3 @@ rootProject.name = 'spring-amqp-dist'
 include 'spring-amqp'
 include 'spring-rabbit'
 include 'spring-rabbit-test'
-

spring-amqp/README.adoc

@@ -0,0 +1,3 @@
+= spring-amqp
+
+This project provides the base abstractions for Spring-AMQP suporting the AMQP 0.9.1 Specification.

spring-rabbit-test/README.adoc

@@ -0,0 +1,3 @@
+= spring-rabbit-test
+
+This project provides testing support classes to help with testing `spring-rabbit` applications.

spring-rabbit/README.md → spring-rabbit/README.adoc

@@ -1,4 +1,8 @@
-Many of the "integration" tests here require a running RabbitMQ server - they
+= spring-rabbit
+
+This project provides the RabbitMQ implementation for the abstractions in `spring-amqp`.
+
+Many of the integration tests here require a running RabbitMQ server - they
 will be skipped if the broker is not detected.
 
 If RabbitMQ is not installed on your system, refer to the instructions for your