Pull #2301: Modernize codebase - Bump maven-checkstyle-plugin to: 3.6.0

Author: Vincent Potucek

its/core-it-support/maven-it-sample-archetype/src/main/resources/archetype-resources/src/test/resources/mng-xxxx/checkstyle-test/pom.xml

@@ -55,7 +55,7 @@ under the License.
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>2.1</version>
+        <version>3.6.0</version>
         <inherited>true</inherited>
         <executions>
           <execution>