Fix wrong script path in rollback tests

Some time ago engines were moved to other folder.

Closes-Bug:#1401511

Change-Id: Id804ff9358d56446fbec4c30f8bab498433c9734
(cherry picked from commit b9d3597a4b5e2a17937e8f44365fbed2aa4c25a9)
Merge "Fix wrong script path in rollback tests" into stable/6.0