Configuring AWS account using EAP - error running CreateServerGroupTask for pipeline Credentials not found*"

Issue

When configuring AWS account using EAP(External Account Plugin) and an account with the name is not configured the following error can appear in the logs: ```error running CreateServerGroupTask for pipeline *Credentials not found” error.**```

Cause

Orca uses a property called: default.bake.account. The expectation is that AWS AMI images are registered in the defined default account using Rosco, and from there, we share those AMIs with the deploy account upon deployment. The default value for default.bake.account is the named defaultif it is not defined within Orca. If the default value is called, and there isn't an account named default, administrators will need to set one in the ~/.hal/default/profiles/orca.yml file in Halyard or in the spec.spinnakerConfig.profiles.orcasection in Operator, with the account that is the source of the custom AWS AMIs. If the default account is missing, the value further falls back to the information defined in the spec.spinnakerConfig.config.providers.aws.primaryAccount section which may not be the same and may not have the AMI images.