What:
We are unable to customize resource requests on the DeploymentConfigs.
Change to the "resources" field is reset by the 3scale operator.

2.9.1 types https://github.com/3scale/3scale-operator/blob/3scale-2.9.1-ER1/pkg/apis/apps/v1alpha1/apimanager_types.go#L161-L168

vs Master
https://github.com/3scale/3scale-operator/blob/master/pkg/apis/apps/v1alpha1/apimanager_types.go#L161-L170

Why:
We will need to change the resources based on throughput target(s) for our managed service.
We need to set equal requests and limits to achieve highest Kubernetes QoS class (docs)