Create hippo-cms-resources shallow war and cleanup hippo-package-cms-resources

hippo-package-cms-resources currently overlays hippo-cms-application (and other war overlays), which means it pulls in its (jar) dependencies too.
This is "fixed" in hippo-package-cms-resources by thereafter excluding any possible pulled in WEB-INF/*.jar again.
While that works its actually not the intended way of doing this.
What is needed is a hippo-cms-resources which only builds a shallow hippo-cms resources war, so without exposing any dependencies (if that pom would need to exclude WEB-INF/*.jar of its own would be more acceptable)

As reference, see hippo-repository-resources project which serves a similar purpose.

Additional improvements to do for hippo-package-cms-resources:

• cleanup web.xml (rename/replace "ECM" texts)
• add default log4j.dtd and log4j.xml configuration