Hornet Q Asynchronous Release: Addition to Release Notes 5.1.2

mbenitez@redhat.com has confirmed that HornetQ will be released Async to the 5.1.2 release. We need to add some words to the Release Notes to reflect this.

I suggested the following draft words, which mbenitez@redhat.com confirmed as acceptable.

HornetQ will be made available through Red Hat Network (RHN) and Customer Portal asynchronously after the JBoss Enterprise Application Platform release. An announcement on HornetQ GA will be released through these update channels.

If you could go ahead and add this paragraph to the About This Release section of the Release Notes 5.1.2 document. A suggested location for this paragraph is in the third paragraph of this section that talks about the HornetQ release.