Final verification migration scripts before release Q2 2020

Process described on #releases channel here https://folio-project.slack.com/archives/CGPMHLX9B/p1590164280223800

Ask Oleksii Petrenko if you have questions.

Having the vagrant box with FOLIO Q1 2020 up and running( FOLIO-2606 @wayne will have Vagrant box with Q1 release (including hot fixes) by Tuesday next week. So devs can get it Wednesday morning)
Build a new version of your module and create a docker image
Deploy this docker image into vagrant box, set log level to debug
Manually (using CURL or any other tools) invoke POST /_/tenant endpoint of the module to simulate OKAPI invocation.
Check the logs, check the DB schema
Extra mile – compare resulting DB schema with the one created when the module is enabled for a tenant from scratch.