engine: Add resteasy dependency to engine.ear manifest

The org.jboss.resteasy.resteasy-jaxrs is being added to
the engine.ear manifest for the sake openstack-java sdk
which requires it.

Change-Id: I1d41c63bc023f025dff46c054deeed0f18188c97
Signed-off-by: Moti Asayag <masayag@redhat.com>