old_contents: config = dict(    
      port='8025',
      app_dir='ureport',
      friendly_name='UReport',
      repository='ssh://git@github.com/rapidpro/ureport.git',
      domain='ureport.in',
      name='ureport',
      repo='ureport',
      user='ureport',
      env='env',
      settings='settings.py.dev',
      dbms='psql',
      db='ureport',
      custom_domains='*.ureport.in ureport.in *.ureport.staging.nyaruka.com',
      prod_host='report1',
      sqldump=False,
      celery=True,
      processes=('celery', 'sync'),
  
      compress=True,
      elb = dict(name='UReport',
                 region='eu-west-1',
                 primary='report1',
                 instances=[dict(name='report1', host='report1.ureport.in', id='i-5ccaec1f'),
                            dict(name='report2', host='report2.ureport.in', id='i-e89fd8aa')])
  )
  
new_contents: config = dict(    
      port='8025',
      app_dir='ureport',
      friendly_name='UReport',
      repository='ssh://git@github.com/rapidpro/ureport.git',
      domain='ureport.in',
      name='ureport',
      repo='ureport',
      user='ureport',
      env='env',
      settings='settings.py.dev',
      dbms='psql',
      db='ureport',
      custom_domains='*.ureport.in ureport.in *.ureport.staging.nyaruka.com',
      prod_host='report1',
      sqldump=False,
      celery=True,
      processes=('celery', 'sync'),
  
      compress=True,
      elb = dict(name='UReport',
                 region='eu-west-1',
                 primary='report1',
                 instances=[dict(name='report1', host='report1.ureport.in', id='i-67e938a7'),
                            dict(name='report2', host='report2.ureport.in', id='i-6b7098fd')])
  )
  
subject: update instance ids