FAILED_STACK_STATES = [
    'CREATE_FAILED',
    'ROLLBACK_FAILED',
    'DELETE_FAILED',
    'UPDATE_ROLLBACK_FAILED'
]
COMPLETE_STACK_STATES = [
    'CREATE_COMPLETE',
    'UPDATE_COMPLETE',
]
ROLLBACK_STACK_STATES = [
    'ROLLBACK_COMPLETE',
    'UPDATE_ROLLBACK_COMPLETE',
]
IN_PROGRESS_STACK_STATES = [
    'CREATE_IN_PROGRESS',
    'ROLLBACK_IN_PROGRESS',
    'DELETE_IN_PROGRESS',
    'UPDATE_IN_PROGRESS',
    'UPDATE_COMPLETE_CLEANUP_IN_PROGRESS',
    'UPDATE_ROLLBACK_IN_PROGRESS',
    'UPDATE_ROLLBACK_COMPLETE_CLEANUP_IN_PROGRESS',
]

move states into separate file