Comment 39 for bug 1749475

I tested Mike's upgrade script and it works as described, preserving any customizations that have been made to the action trigger definitions. This branch fixes a syntax error in the upgrade script and adds my signoff:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/mmorgan/lp1749475_signoff