Moved some data from the TestAwsEndpoint class to the AwsEndpointTestDaata class to allow reuse.
Removed now-redundant tests
Applied the AwsEndpointTestData to the AwsEndpoint::supportedRegions tests.
Applied the AwsEndpointTestData to the AwsEndpoint::supportedServices tests.
Applied the AwsEndpointTestData to the AwsEndpointPrivate::loadEndpointData tests.