Evergreen - Open ILS

Comment 2 for bug 893193

Branch for 2.1 and 2.0. For 2.0, be sure to only cherry-pick the tip and not merge the entire branch.

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/berick/lp893193-acq-po-state-constraint-2_0-and-2_1