revise watcher for multi-series
watcher currently assumes there is only one Neon/release branch
BUUUUUUUUUUUUUUUT
during transitions from one series to another there'll be two unrelated release branches, for each series. I'm not quite sure how to best deal with this. Either make separate watcher jobs for both series or run the same job on multiple branches. Latter has potential of causing a right mess if branch A fails but B succeeds I guess.