[BUG] Gpu resources no longer being applied for pod tasks

[katrogan]

Describe the bug
User reports: We specify resource requirements in the pod for various reasons, one of them is that using "gpu" results in the following error:

Invalid value: "gpu": must be a standard resource type or fully qualified, spec.containers[0].resources.requests[gpu]: Invalid value: "gpu": must be a standard resource for containers] 

(found this closed issue, mb I'm doing something wrong: #180)

Expected behavior
Specifying a gpu resource for a sidecar task should result in the resource being allocated without problems.

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