fix bug stop job before it start

[liwenhui-soul]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

this pr is to solve two points:

1. if stop a job quickly when schedule is going to start the job, it may:
   the job does not exist in runningJobs_ , but exist in inFlightJobs_, so we can't create a new one even if we stopped it.
2. the start time of the job is 0 before starting, so it would always be expired through the calculation of duration, the job's info would be erased and we can't see it in show list.

How do you solve it?

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

ex. Fixed the bug .....

[panda-sheep]

Good