LPS-34234 Removing groupid from the generated path for StagedModels

Hey Mike,

We were fixing this global scope issue we were talking about over skype, and we have figured out that the group id in the generated staged model path is unnecessary, because we don't really use it anywhere, so we decided to remove it, because it much simpler.

The problem was that the global scoped staged model were generated with a global scope id, and when we tried to read them back we didn't have the source global scope id. So we realized that it is not needed at all after all, so we can omit that part.

This is just one portion of the global scope fix, the other will come soon.

Thanks,

Máté