AXIS2-5239: Mention the upgrade to XmlSchema 2 in the 1.7.0 release note.
AXIS2-5239: Mention the upgrade to XmlSchema 2 in the 1.7.0 release note.

git-svn-id: d6acb143e251c037dab5ea34394f8439daf45588@1725125 13f79535-47bb-0310-9956-ffa450edef68

apache/axis2-java,apache/axis2-java,apache/axis2-java,apache/axis2-java,apache/axis2-java