Make generated Junit file compatable with "Maven Surefire"

- add errors attribute to testsuite, currently I will set 0,
but I think Ginkgo must report failures under setup and teardown
methods as errors and not as failures
- cut testsuite timestamp to three digits after the dot

Signed-off-by: Artyom Lukianov <alukiano@redhat.com>

reporters/junit_reporter.go

@@ -11,6 +11,7 @@ package reporters
 import (
 	"encoding/xml"
 	"fmt"
+	"math"
 	"os"
 	"strings"
 
@@ -24,6 +25,7 @@ type JUnitTestSuite struct {
 	Name      string          `xml:"name,attr"`
 	Tests     int             `xml:"tests,attr"`
 	Failures  int             `xml:"failures,attr"`
+	Errors    int             `xml:"errors,attr"`
 	Time      float64         `xml:"time,attr"`
 }
 
@@ -119,8 +121,9 @@ func (reporter *JUnitReporter) SpecDidComplete(specSummary *types.SpecSummary) {
 
 func (reporter *JUnitReporter) SpecSuiteDidEnd(summary *types.SuiteSummary) {
 	reporter.suite.Tests = summary.NumberOfSpecsThatWillBeRun
-	reporter.suite.Time = summary.RunTime.Seconds()
+	reporter.suite.Time = math.Round(summary.RunTime.Seconds() * 1000 / 1000)
 	reporter.suite.Failures = summary.NumberOfFailedSpecs
+	reporter.suite.Errors = 0
 	file, err := os.Create(reporter.filename)
 	if err != nil {
 		fmt.Printf("Failed to create JUnit report file: %s\n\t%s", reporter.filename, err.Error())