[WFLY-943] Use of elementFormDefault='unqualified' cannot validate some ...

...documents

https://issues.jboss.org/browse/WFLY-943

The ejb-client XSDs need these, but jboss-jpa never uses it :-( [Looks like a parsing bug.](https://issues.jboss.org/browse/WFLY-943?focusedCommentId=12940782&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12940782)