functest: use uuid for s3 test
functest: use uuid for s3 test

Signed-off-by: Ruslan Kuprieiev <f6538312ce47017d734b1357aabc970ebf896e32@gmail.com>

dataversioncontrol/dvc,efiop/dvc,dmpetrov/dataversioncontrol,efiop/dvc,dmpetrov/dataversioncontrol,dataversioncontrol/dvc