filter pods by node name and improve oldest pod selection logic #37
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The device plugin allocates a device by selecting the oldest pod, but it did not filter pods by node. This caused a bug if different nodes' pods have the same time assigned by Volcano (e.g., a Gang scheduler). It may get a pod on another node and so assign another node's GPU.
This PR fixes that bug by filtering pods by node name and also improves the oldest pod selection logic by filtering pods that are pending and have the right Volcano annotations.
Hami implement reference: Project-HAMi/HAMi#340