Merge pull request #16 from JDong-rmn/EOPS-5774

Added tests for AwsApiClient and AwsCollection.
added create, destroy methods for acky.ec2.InstanceCollection.
Merge pull request #19 from JDong-rmn/EOPS-6082

added create, destroy methods for acky.ec2.InstanceCollection.
Implemented acky.ec2.InstanceCollection.control
Merge pull request #18 from JDong-rmn/EOPS-6089

Implemented control method for acky.ec2.InstanceCollection: start, stop,...
Implemented acky.s3 with mock and functional tests.