Add Automatic-Module-Name to manifest

[blutorange]

Add Automatic-Module-Name to manifest, see http://branchandbound.net/blog/java/2017/12/automatic-module-name/ Without an explicit name, the compiler will warn when attempting to use this library

[INFO] --- compiler:3.11.0:compile (default-compile) @ simple-servlet-container-tests-common ---
[WARNING] ****************************************************************************************************************************************
[WARNING] * Required filename-based automodules detected: [sardine-5.10.jar]. Please don't publish this project to a public artifact repository! *
[WARNING] ****************************************************************************************************************************************

[lookfirst]

Doesn't seem like it can do much harm.