Following DM-16286, the shared stack build on Princeton systems is broken. We'll need to bootstrap a new shared stack to revive it.
Update version checks in EUPS stub packages to match lsstsw minimums
New stack in place: /tigress/HSC/LSST/stack_tiger2-sumire.princeton.edu_20181028 is suitable for use on either Perseus or Tiger 2. Symlinks /tigress/HSC/LSST/stack_tiger2 and /tigress/HSC/LSST/stack_perseus point to that directory. Old stacks remain available in the same directory; stack2_perseus_20171108 contains weeklies up until last week which will work on both Tiger 2 and Perseus.