Address FindBugs errors
Merge pull request #1347 from maginatics/findbugs

Address FindBugs errors
EC2 Subnet added, with DescribeSubnets support initially.
Merge pull request #1350 from abayer/master

EC2 Subnet added, with DescribeSubnets support initially.
added function to grab first arg during pagination
updated IAM listing to be inline with other recent aws apis
Merge pull request #1351 from jclouds/update-iam

Update iam
various cleanups to get ec2 subnet api up to latest
Merge pull request #1352 from jclouds/ec2-subnet-cleanup

various cleanups to get ec2 subnet api up to latest