Always emit spec summary

in V2 the spec summary behavior was changed such that the summary was only shown if there was more than one failure.  This breaks scrapers that rely on more consistent console output to analyze the test results.

With this commit, Ginkgo will always emit the summary.

Fixed #973

reporters/default_reporter.go

@@ -251,9 +251,13 @@ func (r *DefaultReporter) DidRun(report types.SpecReport) {
 
 func (r *DefaultReporter) SuiteDidEnd(report types.Report) {
 	failures := report.SpecReports.WithState(types.SpecStateFailureStates)
-	if len(failures) > 1 {
+	if len(failures) > 0 {
 		r.emitBlock("\n\n")
-		r.emitBlock(r.f("{{red}}{{bold}}Summarizing %d Failures:{{/}}", len(failures)))
+		if len(failures) > 1 {
+			r.emitBlock(r.f("{{red}}{{bold}}Summarizing %d Failures:{{/}}", len(failures)))
+		} else {
+			r.emitBlock(r.f("{{red}}{{bold}}Summarizing 1 Failure:{{/}}"))
+		}
 		for _, specReport := range failures {
 			highlightColor, heading := "{{red}}", "[FAIL]"
 			switch specReport.State {

reporters/default_reporter_test.go

@@ -1135,6 +1135,11 @@ var _ = Describe("DefaultReporter", func() {
 				},
 			},
 			"",
+			"",
+			"{{red}}{{bold}}Summarizing 1 Failure:{{/}}",
+			"  {{red}}[FAIL]{{/}} {{/}}Describe A {{gray}}{{red}}{{bold}}Context B [JustBeforeEach]{{/}} {{/}}The Test{{/}}",
+			"  {{gray}}cl4.go:144{{/}}",
+			"",
 			"{{red}}{{bold}}Ran 6 of 11 Specs in 60.000 seconds{{/}}",
 			"{{red}}{{bold}}FAIL!{{/}} -- {{green}}{{bold}}5 Passed{{/}} | {{red}}{{bold}}1 Failed{{/}} | {{light-yellow}}{{bold}}2 Flaked{{/}} | {{yellow}}{{bold}}2 Pending{{/}} | {{cyan}}{{bold}}3 Skipped{{/}}",
 			"",