small issue in findDACQfiles

[LaurenzMuessig]

If the identifier matches multiple trials, e.g. in it's something like xxx1 and there is a trial xxx1 and xxx10 it'll return the tetrode from both trials which causes an issue for the spike times loading - I fixed that temporarily by adding a 'unique', but it would be good to not have that issue. This really only affects very historic data from me/Jonas which have a somewhat shitty file naming convention. Not sure it's worth to lose any sleep over this.