Dashboard: rename job support

[Gerhut]

Expect RestfulAPI implement as:

POST /JobName?userName&jobId
Content-Type: application/json

{ "name": "newName" }

[coveralls]

Pull Request Test Coverage Report for Build 3821

• 15 of 15 (100.0%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 92.308%

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Totals
Change from base Build 3815:	0.1%
Covered Lines:	1001
Relevant Lines:	1073

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💛 - Coveralls