Add procedure file for common TUFXOP tasks

[MichaelHuth]

It turned out that some tasks when using the TUFXOP are rather generic.

e.g. attempting to retrieve a named storage and create it if it not exists.

We could wrap these tasks in an own procedure file and possibly later move that to the TUFXOP package as well.

[t-b]

I actually think that this is kind of already solved with the functions in MIES_ThreadsafeDataSharing.ipf or?

[MichaelHuth]

Yes, these functions solve that.