Added Automatic-Module-Name

[doom369]

Add Automatic-Module-Name to the manifest of builded jar and updated the maven-jar-plugin version. This is required to avoid warnings during the build of the systems that switched to the Java 9 modules.

[slandelle]

I'm not familiar with Java modules, but are you sure this is correct?
I would expect each artifact to have its own module name instead of hardcoding org.asynchttpclient.

How things are done in Netty:

• https://github.com/netty/netty/blob/4.1/pom.xml#L1292
• https://github.com/netty/netty/search?q=javaModuleName&unscoped_q=javaModuleName

[doom369]

@slandelle you are right. I missed you have multiple modules.

[doom369]

Pushed the fix. I can't check locally it is correct configuration right now (due to another non-related build errors).

[slandelle]

Thanks!

[doom369]

Thank you as well :)!