Issue #644 Modules for logging

Added log4j2.xml configuration
Added jetty-log4j2 mapping module

jetty-util/src/main/config/modules/jetty-log4j2.mod

@@ -0,0 +1,9 @@
+[description]
+Provides a Jetty Logging implementation that logs to the log4j API.  
+Uses the slf4j and log4j v1.2 mechanisms as intermediaries.
+Requires another module that provides an log4j2 implementation.
+
+[depend]
+jetty-slf4j
+slf4j-log4j
+log4j-log4j2

jetty-util/src/main/config/modules/log4j2-core.mod

@@ -4,12 +4,13 @@ To receive jetty logs enable the jetty-slf4j, slf4j-log4j and log4j-log4j2 modul
 
 [depends]
 log4j2-api 
+resources
 
 [provides]
 log4j2-impl
 
 [files]
-basehome:modules/log4j2/log4j2.properties|resources/log4j2.properties
+basehome:modules/log4j2/log4j2.xml|resources/log4j2.xml
 maven://org.apache.logging.log4j/log4j-core/${log4j2.version}|lib/log4j/log4j-core-${log4j2.version}.jar
 
 [lib]

jetty-util/src/main/config/modules/log4j2/log4j2.properties

@@ -1,11 +0,0 @@
-status = error
-name = PropertiesConfig
- 
-appender.console.type = Console
-appender.console.name = STDOUT
-appender.console.layout.type = PatternLayout
-appender.console.layout.pattern = %m%n
- 
-rootLogger.level = info
-rootLogger.appenderRef.stdout.ref = STDOUT
-

jetty-util/src/main/config/modules/log4j2/log4j2.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Appenders>
+        <Console name="console" target="SYSTEM_ERR">
+            <PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="info" additivity="false">
+            <AppenderRef ref="console"/>
+        </Root>
+    </Loggers>
+</Configuration>
+