EC2 API methods for dealing with security groups doesn't support GroupId

[Jimmy Bergman]

For DescribeSecurityGroups, AddSecurityGroup and DeleteSecurityGroup the latest EC2 API describe a property called GroupId, which optionally can be used instead of GroupName.

This is not supported in the nova EC2 API.

[John Tran (jtran)]

In my proposed branch, I added support for GroupId in the following methods:

DescribeSecurityGroups
DeleteSecurityGroups
RevokeSecurityGroupIngres
AuthorizeSecurityGroupIngres

I didn't see any notion of 'AddSecurityGroup' but I did see 'CreateSecurityGroup' and according to the official AWS API it doesn't support GroupId, and for obvious reasons.