WFLY-3319 Upgrade to Hibernate Validator 5.1.1.Final

Based on top of https://github.com/wildfly/wildfly/pull/6236.

I've added https://github.com/gunnarmorling/wildfly/commit/57a15e117af777f870aa601408d462a88749df02 to update the JSoup version from 1.6.1 to 1.7.1. HV itelf has been depending on 1.7.1 for quite a while already, but for a bug fix in HV 5.1.1 we're now using an API which had been introduced in JSoup 1.7.x.