otelhealth pkg for health state of servers (#10)

* otelhealth pkg for health state of servers

* fix lint issues

* fix up tests

* review comments

go.mod

@@ -8,30 +8,29 @@ require (
 	github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38
 	github.com/alecthomas/colour v0.1.0 // indirect
 	github.com/alecthomas/repr v0.0.0-20200325044227-4184120f674c // indirect
-	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
 	github.com/arr-ai/frozen v0.15.0
 	github.com/arr-ai/hash v0.5.0 // indirect
-	github.com/golang/protobuf v1.4.2
-	github.com/google/go-cmp v0.5.2 // indirect
+	github.com/golang/mock v1.4.4
+	github.com/golang/protobuf v1.4.3
 	github.com/google/go-github/v32 v32.1.0
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.12 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.9.0 // indirect
 	github.com/rs/zerolog v1.20.0
 	github.com/sirupsen/logrus v1.6.0
 	github.com/spf13/afero v1.4.0
 	github.com/stretchr/objx v0.3.0 // indirect
 	github.com/stretchr/testify v1.6.1
 	go.opencensus.io v0.22.4
+	go.opentelemetry.io/otel v0.16.0
 	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a // indirect
 	golang.org/x/net v0.0.0-20200904194848-62affa334b73 // indirect
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/sys v0.0.0-20200909081042-eff7692f9009 // indirect
-	google.golang.org/genproto v0.0.0-20200914193844-75d14daec038 // indirect
+	google.golang.org/genproto v0.0.0-20210207032614-bba0dbe2a9ea // indirect
 	google.golang.org/grpc v1.32.0
 	google.golang.org/protobuf v1.25.0
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
-	gopkg.in/yaml.v2 v2.3.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 )