new_contents: 
  """Update status column to draft
  
  Revision ID: 16883afbc18b
  Revises: 56bda17c92ee
  Create Date: 2015-03-26 19:01:26.702662
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '16883afbc18b'
  down_revision = '56bda17c92ee'
  
  from alembic import op
  import sqlalchemy as sa
  from sqlalchemy.sql import table, column
  from ggrc.models.track_object_state import ObjectStates, ObjectStateTables
  
  def upgrade():
  	for table_name in ObjectStateTables.table_names:
  		# Set the status value to Draft in all existing records where the value is Null
  		object_table = table(table_name,
  							column('status', sa.String(length=250)))
  
  		op.execute(
  			object_table.update().values(status = ObjectStates.DRAFT)\
  				.where(object_table.c.status == None)
  		)
  
  
  def downgrade():
      pass
  
subject: Update object status to Draft when null, CORE-1519