oscarleiva/energylink

Mitsuhiro Tanda ccb063df06 (cloudwatch) add test for custom metrics		%!s(int64=10) %!d(string=hai) anos
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cloudwatch.go	f84737d7d4 (cloudwatch) reuse credentials	%!s(int64=10) %!d(string=hai) anos
metrics.go	b90a078be0 (cloudwatch) change implementation to testable	%!s(int64=10) %!d(string=hai) anos
metrics_test.go	ccb063df06 (cloudwatch) add test for custom metrics	%!s(int64=10) %!d(string=hai) anos