Clean up test logs (#190)

* Truncate commands outputs to 500 chars

* Format k8s logs so we get a proper new line for nmstate

test/e2e/utils.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os/exec"
 	"strings"
 	"testing"
@@ -57,12 +58,13 @@ func writePodsLogs(namespace string, sinceTime time.Time, writer io.Writer) erro
 			continue
 		}
 		defer podLogs.Close()
-		_, err = io.Copy(writer, podLogs)
+		rawLogs, err := ioutil.ReadAll(podLogs)
 		if err != nil {
-			io.WriteString(writer, fmt.Sprintf("error in copy information from podLogs to buf: %v\n", err))
+			io.WriteString(writer, fmt.Sprintf("error reading kubernetes-nmstate logs: %v\n", err))
 			continue
 		}
-
+		formattedLogs := strings.Replace(string(rawLogs), "\\n", "\n", -1)
+		io.WriteString(writer, formattedLogs)
 	}
 	return nil
 }
@@ -223,7 +225,7 @@ func run(node string, command ...string) (string, error) {
 	cmd.Stderr = &stderr
 	cmd.Stdout = &stdout
 	err := cmd.Run()
-	GinkgoWriter.Write([]byte(stdout.String() + stderr.String() + "\n"))
+	GinkgoWriter.Write([]byte(fmt.Sprintf("stdout: %.500s...\n, stderr %s\n", stdout.String(), stderr.String())))
 	// Remove first two lines from output, ssh.sh add garbage there
 	outputLines := strings.Split(stdout.String(), "\n")
 	output := strings.Join(outputLines[2:], "\n")