Code Formating via Maven

[rsoika]

Introduce code formater maven plugin:

		<!-- code style -->
		<plugin>
			<groupId>net.revelc.code.formatter</groupId>
			<artifactId>formatter-maven-plugin</artifactId>
			<configuration>
				<configFile>${project.parent.basedir}/imixs-code-style.xml</configFile>
			</configuration>
			<executions>
				<execution>
					<phase>clean</phase>
					<goals>
						<goal>format</goal>
					</goals>
				</execution>
			</executions>
		</plugin>

Pre requirement is java version 11