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All external types that are not int64 are now marked as int32,
including
IntOrString. Prober is now int32 (43 years should be enough of an initial
probe time for anyone).

Did not change the metadata fields for now.

Update GCE flaky suite

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Move KubeProxy test to GKE_FLAKY

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Refactor GCE wrapper library to allow execution from E2E test suite

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Addresses a version skew issue where the last condition status is always
evaluated as the NodeReady status. As a workaround force the NodeReady
condition to be the last in the list of node conditions.

ref: https://github.com/kubernetes/kubernetes/issues/16961

This reverts commit 147b6911, reversing
changes made to 6fd98606.

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for top-level types.

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