Issue 592 : support service meta data#593

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lucwillems wants to merge 2 commits intoTritonDataCenter:masterfrom

lucwillems:issue_592

Commits on Jun 8, 2021

- upgrade build dependency to go 1.13
lucwillems
committed

Commits on Jun 16, 2021

- update docs about usage of key names
lucwillems
committed