GH-59: Fix log4j Sample

Resolves https://github.com/spring-projects/spring-amqp-samples/issues/59

Add packages to `Configuration`, change SF version to 5.2.4.B-S.

.gitignore

@@ -17,3 +17,4 @@ jredis.log
 *.ipr
 *.iws
 .sts4-cache
+.factorypath

log4j2/pom.xml

@@ -40,6 +40,12 @@
 			<artifactId>spring-boot-starter-log4j2</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-jcl</artifactId>
+			<version>5.2.4.BUILD-SNAPSHOT</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

log4j2/src/main/resources/log4j2.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Configuration>
+<Configuration packages="org.springframework.amqp.rabbit.log4j2">
 	<Appenders>
 		<Console name="STDOUT" target="SYSTEM_OUT">
 			<PatternLayout pattern="%m%n" />