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Fix pod scheduled.
Fix `PodScheduled` condition.
The test `[k8s.io] EquivalenceCache [Serial] validates pod affinity works properly when new replica pod is scheduled` for cri-containerd is flaky.
The reason is that it assume all existing pods should have `PodScheduled` condition, but it is not the case:
```
Feb 15 15:31:01.359: INFO: with-label-390d246e-1265-11e8-beb8-0a580a3c7b55 bootstrap-e2e-minion-group-l6qw Running [{Initialized True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 15:30:59 +0000 UTC } {Ready True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 15:31:00 +0000 UTC } {PodScheduled True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 15:30:59 +0000 UTC }]
Feb 15 15:31:01.359: INFO: calico-node-7mzxc bootstrap-e2e-minion-group-hztx Running [{Initialized True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 14:17:05 +0000 UTC } {Ready True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 14:17:59 +0000 UTC }]
Feb 15 15:31:01.359: INFO: calico-node-kvrsx bootstrap-e2e-minion-group-l6qw Running [{Initialized True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 15:24:54 +0000 UTC } {Ready True 0001-01-01 00:00:00 +0000 UTC 2018-02-15 15:25:20 +0000 UTC }]
Feb 15 15:31:01.359: INFO: calico-node-llwjh
```
I'm not sure why this doesn't happen to docker. One theory is that we don't prepull image in cri-containerd, and we do start pod a bit faster for cri-containerd, and that exposes the race condition.
/cc @kubernetes/sig-node-bugs
Signed-off-by: Lantao Liu <lantaol@google.com>
**What this PR does / why we need it**:
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
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**Special notes for your reviewer**:
**Release note**:
```release-note
none
```
c105796e4b