--groups flag stop to recognize the group id (sg-...)

knife-ec2 v0.5.10 allowed to use the Amazon security group IDs (for instance, sg-4e63c727) on server creation. But v0.5.12 returns the error in such the case:

—
$ knife ec2 server create --groups sg-4e63c727
ERROR: Fog::Compute::AWS::NotFound: The security group 'sg-4e63c727' does not exist
—

The group exists:

—
pry(main)> require 'fog'
pry(main)> compute = Fog::Compute.new({:provider => 'AWS', :aws_access_key_id => ENV['AWS_ACCESS_KEY_ID'], :aws_secret_access_key => ENV['AWS_SECRET_ACCESS_KEY']})
pry(main)> compute.describe_security_groups.body['securityGroupInfo'].keep_if { |gr| gr['groupId'] == 'sg-4e63c727' }
=> [{"ipPermissions"=>
[{"groups"=>[],
"ipRanges"=>[{"cidrIp"=>"0.0.0.0/0"}],
"ipProtocol"=>"tcp",
"fromPort"=>0,
"toPort"=>65535},
{"groups"=>[],
"ipRanges"=>[{"cidrIp"=>"0.0.0.0/0"}],
"ipProtocol"=>"tcp",
"fromPort"=>80,
"toPort"=>80},
{"groups"=>[],
"ipRanges"=>[{"cidrIp"=>"0.0.0.0/0"}],
"ipProtocol"=>"tcp",
"fromPort"=>443,
"toPort"=>443},
{"groups"=>[],
"ipRanges"=>[{"cidrIp"=>"0.0.0.0/0"}],
"ipProtocol"=>"tcp",
"fromPort"=>8080,
"toPort"=>8080}],
"ipPermissionsEgress"=>[],
"ownerId"=>"284139518214",
"groupId"=>"sg-4e63c727",
"groupName"=>"test",
"groupDescription"=>"test"}]
—

I propose to return the previous behavior and let to use groupId along with groupName.