SUSH: Deserialize and deletion issues

[mbtools]

https://github.com/abapGit-tests/SUSH works, but there are other issues:

• Deserializing "lead application does not exist" Examples: https://github.com/abapGit-tests/HTTP, https://github.com/abapGit-tests/SAJC_dep
• Incomplete deletion (#7128)

[mbtools]

it looks like we should serialize/deserialize usobhash

[fabianlupa]

The changed by field also sometimes shows !USOBHASH for some reason.

Edit: Which is somehow correct I guess.