Add some assert()s
Rename local variable to make it more explanatory
Get rid of deprecation of deleteWithoutCommit(Identity):
- It might be useful for testing for database object leaks.
- Therefore, this commit adds capslock to the JavaDoc which explains for what it should NOT be used.
- Also, it is explained what the function WOULD be useful for
- Notice that I have filed a bug for the suggested feature of leakage testing: https://bugs.freenetproject.org/view.php?id=5861