Results 2 issues of Seungchan Ahn

Closes: #8396 ##### Broken Tests: ```json { "test/unit/lib/plugins/aws/package/compile/events/cloudFront.test.js": [ "AwsCompileCloudFrontEvents > #compileCloudFrontEvents() > should throw an error if the region is not us-east-1", "AwsCompileCloudFrontEvents > #compileCloudFrontEvents() > should create corresponding...

refactor
cat/aws-iam