Please add automatic JPMS module name manifest entry to all product JARs

[lprimak]

Describe the bug

Currently, compiling against any MicroProfile Spec JARs of modular applications causes a mean warning:

[WARN] *****************************************************************************************************************************************************************************************************
[WARN] * Required filename-based automodules detected: [microprofile-config-api-3.0.2.jar]. Please don't publish this project to a public artifact repository! *
[WARN] *****************************************************************************************************************************************************************************************************

Please add the manifest entry as described here: http://branchandbound.net/blog/java/2017/12/automatic-module-name/

            <plugin>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifestEntries>
                            <Automatic-Module-Name>microprofile.config.api</Automatic-Module-Name>
                        </manifestEntries>
                    </archive>
                </configuration>
            </plugin>

This will resolve future incompatibilities with JPMS-based applications, while preserving compatibility with Java 8, if necessary