Lite-spec for a dry-run option for db upgrades in glance-manage.
This spec is moved from /specs/untargeted/glance/lite-spec-db-sync-check.rst
to /specs/queens/implemented/glance/lite-spec-db-sync-check.rst because it was
implemented by change I1e0b02d615690f65a17b4ccfe4e4a72cc9e15ada
Change-Id: Ice1ab9657e236d969df50016a3b47a893e6aff0c