Remove |destroy methods from models

[Matthias Schoettle]

The Map and ZeroToMany aspect contain |destroy methods, which are usually not mapped in our examples. They have an empty message view, which is affected by cleanup.

Since we are currently only mapping to Java we don't need them. In the future, however, if we want to support non garbage collected languages, we might need it again. In that case, we have to decide whether this would be a mandatory element to be mapped or what happens if it isn't mapped (the weaver could ignore it).

[Matthias Schoettle]

Fixed issue #56: Removed |destroy method and message view from |Data and the cleanup aspect message view from both Map and ZeroToMany aspects.

→ <<cset f80ef509ef2d>>