Clarify Icehouse features not deployed by Fuel 5.0

I moved the list of Havana capabilities not supported by Fuel 4.x
into the Icehouse release, because it is supported.

Also changed phraseology from "not supported by" to "not deployed by"

Change-Id: I3ceebd22a2a1432d20bea8147401808250884daa
Closes-Bug: 1332324