rosie web: all_revs=1 instead of all_revs=on
Merge pull request #1442 from matthewrmshin/rosie-web-all-revs-on

rosie web: all_revs=1 instead of all_revs=on
rose host-select: improve performance

Don't SSH all hosts if ranking method is random and there is no
thresholds to consider. Shuffle host list, and return 1st available
host.