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.
Merge branch 'master' of github.com:JDong-rmn/acky into EOPS-6008