Use service_id instead of connection_id

[congwang09]

From the 2.0 specification, we'll return service_id as response for place_connection.

[coveralls]

Pull Request Test Coverage Report for Build 9997011044

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.486%

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Totals
Change from base Build 9876876115:	0.0%
Covered Lines:	763
Relevant Lines:	1478

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💛 - Coveralls