check-migration test

check for var definitions

create configs for migration

fixing ansible command

setting extravars

run migrations using a new ansible play

missing spaces

removing venv var

adding verbose flag to ansible run for migrations

fixing newline output

add db_dry_run var

add db_dry_run logic

facts not needed for migration

fixing name
Merge pull request #1185 from edx/jarv/migrations

Jarv/migrations