[JAVA-41272] Fixed test for log4j (#18445)

Author: panos-kakos

logging-modules/log4j/pom.xml

@@ -82,7 +82,7 @@
                 <configuration>
                     <systemPropertyVariables>
                         <test.mime>json</test.mime>
-                        <logging.folder.path>${java.io.tmpdir}/${maven.build.timestamp}/logfile.json</logging.folder.path>
+                        <logging.folder.path>target/logfile.json</logging.folder.path>
                     </systemPropertyVariables>
                 </configuration>
             </plugin>

logging-modules/log4j/src/test/resources/log4j2.xml

@@ -21,6 +21,13 @@
             <Column name="message" pattern="%message"/>
             <Column name="throwable" pattern="%ex{full}"/>
         </JDBC>
+        <File name="JSONLogfileAppender" fileName="target/logfile.json">
+            <JSONLayout compact="true" eventEol="true"/>
+            <BurstFilter level="INFO" rate="2" maxBurst="10"/>
+        </File>
+        <Async name="AsyncAppender" bufferSize="80">
+            <AppenderRef ref="JSONLogfileAppender"/>
+        </Async>
     </Appenders>
     <RollingFile name="XMLRollingfileAppender" fileName="target/logfile.xml"
                  filePattern="target/logfile-%d{yyyy-MM-dd}-%i.log.gz">