Revert "restapi: Add support for JAXB annotations in JSON"

same can be done against standard resteasy-jackson-provider
(which we want stick to, cause by using jackson-jaxrs directly, we
lose all resteasy extensions)

This reverts commit e87a70e006b8638b206bad01c02918030b255a0c.

Signed-off-by: Michael pasternak <mpastern@redhat.com>
Change-Id: I5dfa9732952da951011c859e818daf6166c0436f