not validate maxsize minsize when create "AWS::AutoScaling::AutoScalingGroup"

[Zhang Yang]

"AWS::AutoScaling::AutoScalingGroup" can be created successfully even the template is wrong，such as:

 MinSize > MaxSize :

  WebServerGroup:
    Properties:
      AvailabilityZones: {'Fn::GetAZs': ''}
      LaunchConfigurationName: {Ref: LaunchConfig}
      MaxSize: '1'
      MinSize: '3'
    Type: AWS::AutoScaling::AutoScalingGroup

size < 0:

  WebServerGroup:
    Properties:
      AvailabilityZones: {'Fn::GetAZs': ''}
      LaunchConfigurationName: {Ref: LaunchConfig}
      MaxSize: '-1'
      MinSize: '-3'
    Type: AWS::AutoScaling::AutoScalingGroup

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/67618

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/67618
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=e1d75b4a7ca88e7b92592db9864e6720ac649452
Submitter: Jenkins
Branch: master

commit e1d75b4a7ca88e7b92592db9864e6720ac649452
Author: Zhang Yang <email address hidden>
Date: Fri Jan 17 19:07:18 2014 -0800

    add the validation of MaxSize ,MinSize and DesiredCapacity

    * check whether MinSize is less than MaxSize
    * check whether MinSize and MaxSize is not less than 0
    * if DesiredCapacity is offered,check whether it is between
      MinSize and MaxSize

    Change-Id: I79a7b6c0e61f109ac7e71d3fd48d93fb741bbc64
    Closes-Bug: #1270070