org.testcontainers:postgresql artifact name clashes with org.postgresql:postgresql

The artifact (and jar names) of the testcontainers postgres module and the postgres driver are the same. This prevents using these two together in a Java 9 project using the module system. Java infers the module name automatically from the name of the Jar file.

There is a fix for this described here: http://branchandbound.net/blog/java/2017/12/automatic-module-name/
Java allows setting an automatic module name in the Manifest.mf file of a library without modularizing the library itself.

Inspect the PostgreSQL module's artifact and JAR packaging configuration, then compare it with the automatic-module-name approach described in the linked article. Done means the Testcontainers PostgreSQL artifact can coexist with org.postgresql:postgresql in a Java 9 module-system project without a derived module-name clash.