Change container workload's default OOM Score

This makes the container workload a very likely candidate for the
OOMKiller when the CS VM is experiencing out of memory issues.

Author: alexmwu

launcher/container_runner.go

@@ -186,6 +186,10 @@ func NewRunner(ctx context.Context, cdClient *containerd.Client, token oauth2.To
 	if err != nil {
 		return nil, &RetryableError{err}
 	}
+
+	// Set the container process's OOM score to 1000.
+	containerSpec.Process.OOMScoreAdj = 1000
+
 	// Container process Args length should be strictly longer than the Cmd
 	// override length set by the operator, as we want the Entrypoint filed
 	// to be mandatory for the image.