Automatic merge from submit-queue (batch tested with PRs 48262, 48805)

[Scheduler] Use const value maxPriority instead of immediate value 10
Signed-off-by: sakeven <jc5930@sina.cn>



**What this PR does / why we need it**:

Use const value maxPriority instead of immediate value 10.

**Special notes for your reviewer**:

**Release note**:

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NONE
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