Fix golint failures of e2e/framework/f*.go

This fixes golint failures of the following files:
- test/e2e/framework/flake_reporting_util.go
- test/e2e/framework/framework.go

test/e2e/framework/flake_reporting_util.go

@@ -22,12 +22,14 @@ import (
 	"sync"
 )
 
+// FlakeReport is a struct for managing the flake report.
 type FlakeReport struct {
 	lock       sync.RWMutex
 	Flakes     []string `json:"flakes"`
 	FlakeCount int      `json:"flakeCount"`
 }
 
+// NewFlakeReport returns a new flake report.
 func NewFlakeReport() *FlakeReport {
 	return &FlakeReport{
 		Flakes: []string{},
@@ -62,12 +64,14 @@ func (f *FlakeReport) RecordFlakeIfError(err error, optionalDescription ...inter
 	f.FlakeCount++
 }
 
+// GetFlakeCount returns the flake count.
 func (f *FlakeReport) GetFlakeCount() int {
 	f.lock.RLock()
 	defer f.lock.RUnlock()
 	return f.FlakeCount
 }
 
+// PrintHumanReadable returns string of flake report.
 func (f *FlakeReport) PrintHumanReadable() string {
 	f.lock.RLock()
 	defer f.lock.RUnlock()
@@ -80,12 +84,14 @@ func (f *FlakeReport) PrintHumanReadable() string {
 	return buf.String()
 }
 
+// PrintJSON returns the summary of frake report with JSON format.
 func (f *FlakeReport) PrintJSON() string {
 	f.lock.RLock()
 	defer f.lock.RUnlock()
 	return PrettyPrintJSON(f)
 }
 
+// SummaryKind returns the summary of flake report.
 func (f *FlakeReport) SummaryKind() string {
 	return "FlakeReport"
 }