Show duration for each ginkgo test and test speed improvements

Because our tests are getting so long, we want to be able to audit which tests are taking
the longest to complete.  This may indicate a bad test, bad CI, bad code, etc and therefore
should be auditable.

Also, make speed improvements to tests by making sure we only unpack caches images that
actually get used.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #1178
Approved by: mheon

test/e2e/namespace_test.go

@@ -1,6 +1,7 @@
 package integration
 
 import (
+	"fmt"
 	"os"
 
 	. "github.com/onsi/ginkgo"
@@ -25,7 +26,9 @@ var _ = Describe("Podman namespaces", func() {
 
 	AfterEach(func() {
 		podmanTest.Cleanup()
-
+		f := CurrentGinkgoTestDescription()
+		timedResult := fmt.Sprintf("Test: %s completed in %f seconds", f.TestText, f.Duration.Seconds())
+		GinkgoWriter.Write([]byte(timedResult))
 	})
 
 	It("podman namespace test", func() {