EC2 VPC EIPs - EUCA-9730

Elastic IP address support for EC2 VPC. Elastic IPs can now be allocated
for use in a VPC and associated with an ENI.

EUCA-9730
EC2 VPC filtering for instances - EUCA-9614

Support for vpc filters with ec2 instances. This includes filters such
as the instances vpc identifier, subnet identifier, and by many network
interface properties.

EUCA-9614
Merge remote-tracking branch 'origin/dev/sjones/EUCA-9614' into testing
Fix EC2 resource filter unit test - EUCA-9614