[Parallel] remove full signature of the task in the crash tests

[bruno-at-orange]

In the crash tests scenari, we have to write the full task signature e.g. Database check_9_8_15. The signature is built starting from the number of shared variables. When the code of the task is modified, the signature may change and the scenario of the crash test is obsolete. We have to simplify this by using the task name rather than it signature.