Resource primary identifiers are not properly detected

[RedbackThomson]

Describe the bug
The runtime attempts to determine the unique resource identifier (used to identify resources in the ReadOne) call using the name of the fields.
It does so by finding any fields named "Name", "{Resource}Name", "ID", "{Resource}ID" in that order.
For some resources, such as the MQ Broker, the unique resource identifier used in ReadOne is "BrokerID", but the runtime incorrectly determines it to be "Name" since the "Name" field also appears in the Create* spec.

Steps to reproduce

1. Run the current code-generator for the MQ repository.
2. See pkg/resource/broker/resource.go L83 contains r.ko.Spec.Name = identifier.NameOrID

Expected outcome
pkg/resource/broker/resource.go L83 contains r.ko.Spec.BrokerID = identifier.NameOrID

[RedbackThomson]

The generated code forming the newDescribeRequestPayload in sdk.go understands all of the fields necessary to identify a resource for the ReadOne operation.

I'll combine the fix for this issue with the changes to aws-controllers-k8s/runtime#13 to create a comprehensive list of required identifiers for adoption.