Improve rss(BAEL-1273) and done with BAEL-1519 (#3692)

* BAEL-1216: improve tests

* BAEL-1448: Update Spring 5 articles to use the release version

* Setting up the Maven Wrapper on a maven project

* Add Maven Wrapper on spring-boot module

* simple add

* BAEL-976: Update spring version

* BAEL-1273: Display RSS feed with spring mvc (AbstractRssFeedView)

* Move RSS feed with Spring MVC from spring-boot to spring-mvc-simple

* BAEL-1285: Update Jackson articles

* BAEL-1273: implement both MVC and Rest approach to serve RSS content

* RSS(XML & Json) with a custom model

* BAEL-1273: remove a resource

* BAEL-1519: Guide to scribejava

* BAEL-1273: improve xml representation

* Fix pom

out/production/main173/log4j.properties

@@ -0,0 +1,9 @@
+# Set root logger level to DEBUG and its only appender to A1.
+log4j.rootLogger=DEBUG, A1
+
+# A1 is set to be a ConsoleAppender.
+log4j.appender.A1=org.apache.log4j.ConsoleAppender
+
+# A1 uses PatternLayout.
+log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n