Fix synchronization requirements JavaDoc of updateScoresWithoutCommit():
- It is a caller of computeAllScoresWithoutCommit() so it has to constrain to its requirements.
- I will update all callers of this function in the following commits.
- Notice: The previous commits stated that the callers of [begin/abort/finish]trustListImport() would be updated in the following commits. I've checked all callers and no updating is necessary, they are properly synchronized already.