Update release notes to add Java 6 requirement to 3.2.0 and 3.2.2 releases.
Update release notes to add Java 6 requirement to 3.2.0 and 3.2.2 releases.

I plan to merge this onto the 3.2.2 tag for posterity.

Code review: https://codereview.appspot.com/23910043/

googlegsa/documentum.v3,googlegsa/documentum.v3