Item 7554: upgrade to log4j2 (#9)

Author: labkey-ankurj

labkey-client-api/src/log4j.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<Configuration>
+
+    <Appenders>
+        <Console name="CONSOLE" target="SYSTEM_OUT">
+            <!-- p=priority c=category d=datetime t=thread m=message n=newline -->
+            <PatternLayout pattern="%-5p %c{1} - %m%n" />
+        </Console>
+    </Appenders>
+
+    <Loggers>
+        <Root level="error">
+            <AppenderRef ref="CONSOLE"/>
+        </Root>
+    </Loggers>
+
+</Configuration>