in fedora we use a modified version of maven that does not need to modify this type of data in the pom file

That does not make any sense to me. The strong point if Maven is its dependency management. We go through quite some trouble to pick the right versions for dependencies. If you decide to change these versions, how can you claim that you are building HV master. You don't! You are building a fork/branch at best.

in fedora we must always use the latest version of each library or tool

I think you will need to leave it to the projects which versions of libraries they want to use.

In fedora we cant use JBoss nexus or other remote repository we must use only system libraries.

That does not make any sense at all. As said, you are not building Hibernate Validator anymore. What is the point of this?

We use maven-jaxb2-plugin instead of jaxb2-maven-plugin because is more compatible with maven 3.x

According to the website maven-jaxb2-plugin was last updated January 23, 2011, whereas jaxb2-maven-plugin was last published 2012-08-26. Looks to that latter is more active. You would have to bring some technical reasons why we should switch plugins or downgrade plugin versions. Also I would need a pull request which the suggested changes to be tested on different machines. And these changes need to work with a standard maven running against the JBoss repository.