#970 single logging framework should be enforced (#982)

* #496 Add pipeline module to parent pom ✨

* #496: Add main application class and test for pipeline

* #496: Checkstyle format and add log messages on pipeline stages 🎨

* #496: Fill readme sections of pipeline ✨

* #496: Javadocs and checkstyle formatting 🎨

* #496: Follow PMD checks and add more explanation as block comment on App.java

* #496: Apply requested PR changes by iluwatar 🎨

* #970: Replace log4j usage on commander pattern to Slf4j API 🎨

* #970: Replace log4j usage on dao pattern to Slf4j API 🎨

* #970: Replace log4j usage on data mapper pattern to Slf4j API 🎨

* #970: Remove log4j dependency on data transfer object pom 🔥

* #970: Replace log4j usage on module pattern to Slf4j API 🎨

* #970: Replace log4j usage on serverless pattern to Slf4j API 🎨

This also removes the aws log4j dependency

* #970: Remove unnecessary gitignore line for log4j.xml 🔥

* #970: Remove remaining remnants of log4j 🔥

* #970: Replace System.out logging with appropriate logging methods 🎨

* #970: Replace System.out method references to Logger::info 🎨

dao/pom.xml

@@ -40,10 +40,6 @@
       <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>log4j</groupId>
-      <artifactId>log4j</artifactId>
-    </dependency>
     <dependency>
         <groupId>com.h2database</groupId>
         <artifactId>h2</artifactId>
@@ -53,49 +49,4 @@
         <artifactId>mockito-core</artifactId>
     </dependency>
   </dependencies>
-
-  <build>
-
-    <!-- 
-    log4j.xml file will be copied both in ${project.build.outputDirectory} 
-    and ${project.build.directory}. Thanks to Sean Patrick Floyd 
-    (http://stackoverflow.com/questions/5637532/maven-how-to-place-resource-file-together-with-jar) 
-    -->
-      
-    <resources>
-      <resource> <!-- regular processing for every resource file -->
-        <directory>src/main/resources</directory>
-      </resource>
-      <resource> <!-- processing with a different output directory for log4j.xml -->
-        <directory>src/main/resources</directory>
-        <includes>
-          <include>log4j.xml</include>
-        </includes>
-        <targetPath>..</targetPath> <!-- relative to target/classes i.e. ${project.build.directory} -->
-      </resource>
-    </resources>
-
-    <plugins>
-
-      <!-- 
-      This will exclude log4j.xml file from generated JAR 
-      -->
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-jar-plugin</artifactId>
-        <version>2.6</version>
-        <configuration>
-          <excludes>
-            <exclude>log4j.xml</exclude>
-          </excludes>
-          <archive>
-            <manifest>
-              <addClasspath>true</addClasspath>
-            </manifest>
-          </archive>
-        </configuration>
-      </plugin>
-
-    </plugins>
-  </build>
 </project>