CA-210990 - Increase Windows Destop OS limits
CA-210990 - Increase Windows Destop OS limits

Microsoft support, and we test, higher than the current default limits.

While at it, adjust the Server OSes to round powers of two, which is also what
what we test.

(Commit var better viewed with `git show --color-words`)

xenserver/guest-templates,xenserver/guest-templates