bug: scenario-set-alternative-stream- operators such as scov, tcov, dcov, postman, trip, etc. must return computations to micksutils SetStreamMultiplier via Set::stream() instead of Stream::of(). Fixed for tcov and postman. Re-routed computation of generateStatecoverages(..) through generalized method generatePermutated(..). Did the same for tcov and postman. [ as of corporate 796e1d592735c082e96564c0f55ee1f8e9517733 ]