Switch from 4.1p to 5.0p - changed Java dependencies questions

Hello Isomorphic,

I'm in the process of switching from 4.1p to 5.0p and have some questions regarding changed jar-dependencies as well as general jar-dependency questions:

1. It seems httpclient-4.3.3.jar and httpcore-4.3.2.jar replace the no longer needed commons-httpclient-3.1.jar, correct?
2. There are new files operadriver-1.5.jar and phantomjsdriver-1.1.0.jar. Are these only needed when using isomorphic_autotest.jar? They are not in JavaModuleDependencies.
3. There are new files htmlunit-2.14.jar and htmlunit-core-js-2.14.jar which are not listed in JavaModuleDependencies.
4. validation-api-1.0.0.GA.jar and javassist-3.4.GA.jar are not listed in JavaModuleDependencies, either. I included them until now, so I will continue to do so. But if they are not needed, I'd like to remove them.
5. XML Export used to list xbean and jsr173_1.0_api as dependencies. Now it lists xmlbeans. While there still is a xbean.jar, there is no xmlbeans.jar. (jsr173_1.0_api.jar was never there.)

Thank you & Best regards,
Blama