schema.rb and annotate

[mtnstar]

our development docker image is currently based on centos which brings pretty old mysql libs with it. this causes unwanted changes for schema.rb and also creates annoying changes for the annotation in model class files.

we're working on a new ruby image for running our rails apps in production. it probably makes sense to use this image in this development setup. so if this image is updated, annotate can probably just be re-enabled.