Automatic merge from submit-queue

Bump rescheduler version to v0.3.1

**What this PR does / why we need it**:
Bump Rescheduler version to v0.3.1 to log to STDERR.

**Which issue this PR fixes**
Fixes https://github.com/kubernetes/contrib/issues/2518

**Release note**:
```release-note
NONE
```