modify namespace, remove unnecessary elements.

I tested application with original XML by http-post (curl) and xmpp (Psi), but it doesn't work well.
Original XMLs were rejected by application server.

I noticed that original XML has some mismatch with xsd.
1) namespace "http://openadr.org/oadr-2.0a/2012/07" is fine.
2) some elements in original XML does not appear in xsd.

After this modification of XML files, I could verify that http-post and xmpp-send suceed.