DO NOT MERGE: Test with lower reservations for debugging the real failure

[smarterclayton]

Reverts #1450 so that we can easily test why the system failed.

Running out of memory should not cause nodes to die longer than the time for the kubelet to restart, nor silently corrupt the behavior of the kubelet.

[openshift-ci-robot]

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[openshift-ci-robot]

@smarterclayton: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-gcp-upgrade	443ed66	link	/test e2e-gcp-upgrade
ci/prow/e2e-aws-scaleup-rhel7	443ed66	link	/test e2e-aws-scaleup-rhel7

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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