Use sqlalchemy.text instead of bare strings to quiet warnings
Use sqlalchemy.text instead of bare strings to quiet warnings

Summary:
This changes the changed tests code in the BuildDetailsAPIView endpoint to use `text`,
which avoids a sqlalchemy warning added in v1.0.
Warning: https://sentry.build.itc.dropbox.com/devtools/changes/group/259994/events/24147827/
Docs: http://docs.sqlalchemy.org/en/latest/core/tutorial.html#using-text-fragments-inside-bigger-statements

Test Plan: Unit

Reviewers: paulruan

Reviewed By: paulruan

Subscribers: changesbot

Differential Revision: https://tails.corp.dropbox.com/D208010

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