'Test simple update only and no replace with no conflict.
Test simple update only and no replace (i.e. updated instance flavor
in Launch Configuration) with no conflict in batch size and
minimum instances in service.'

def test_instance_group_update_no_replace(self):

    updt_template = self.ig_tmpl_with_updt_policy()
    group = updt_template['Resources']['JobServerGroup']
    policy = group['UpdatePolicy']['RollingUpdate']
    policy['MinInstancesInService'] = '1'
    policy['MaxBatchSize'] = '3'
    policy['PauseTime'] = 'PT0S'
    config = updt_template['Resources']['JobServerConfig']
    config['Properties']['InstanceType'] = self.conf.instance_type
    self.update_instance_group(updt_template, num_updates_expected_on_updt=5, num_creates_expected_on_updt=0, num_deletes_expected_on_updt=0, update_replace=False)
