Service discovery with etcd

[coveralls]

Pull Request Test Coverage Report for Build 30

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 73.913%

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Files with Coverage Reduction	New Missed Lines	%
balancer/virtualserver.go	2	59.22%
<!--	Total:	2		-->

Totals
Change from base Build 26:	-0.2%
Covered Lines:	612
Relevant Lines:	828

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💛 - Coveralls