fixed default facets for depended "java" projects

What did I do:
* only "fixed" facets are senseless as they have no effect at all such that I added "installed" facets instead
* "jst.web" and "jst.utility" are not allowed together and not required for an "war" depended "java" project
* "jst.utility" requires "jst.java"
* adjusted tests accordingly to the above statements

This was already discussed in http://gradle.1045684.n5.nabble.com/Default-configurations-for-Eclipse-WTP-plugin-on-dependent-jar-td5713163.html (just nobody answers to my latest questions as I am have already prepared a lot more changes to the ```EclipseWtpPlugin``` ...)