Implemented get, create, destroy, associate, and disassociate for EIPs.
Merge pull request #13 from JDong-rmn/EOPS-5772

Implement acky.ec2.ElasticIPCollection
Implemented get, create, destroy, attach, and detach methods for acky.ec2.Volumes.
Merge pull request #17 from JDong-rmn/EOPS-5878

Implemented get, create, destroy, and attach methods for acky.ec2.Volumes
Added tests for AwsApiClient and AwsCollection.