Ignore the VPC network validation when editing scaling group on no VPC supported system
Updated Launchconfig create to set associate_public_ip flag to None if no VPC is supported
In case of no vpc scaling group, do not validate vpc network field when updating
Added a comment regartding associate_public_ip_address values on launchconfig view
Merge pull request #1207 from eucalyptus/GUI-1513

GUI-1513 Adjusted the VPC network field validation for non-VPC system