tests: Refactors PodSandbox creation

Most of the tests creating and using Pod Sandboxes in the same way. We can create
a common function that will do that for us, so we can have less duplicated code,
and make it easier to add new tests in the future.

Signed-off-by: Claudiu Belu <cbelu@cloudbasesolutions.com>

integration/runtime_handler_test.go

@@ -29,20 +29,12 @@ import (
 // TODO(chrisfegly): add/update test(s) to allow testing of multiple runtimes at the same time
 func TestRuntimeHandler(t *testing.T) {
 	t.Logf("Create a sandbox")
-	sbConfig := PodSandboxConfig("sandbox", "test-runtime-handler")
-
 	if *runtimeHandler == "" {
 		t.Logf("The --runtime-handler flag value is empty which results internally to setting the default runtime")
 	} else {
 		t.Logf("The --runtime-handler flag value is %s", *runtimeHandler)
 	}
-	sb, err := runtimeService.RunPodSandbox(sbConfig, *runtimeHandler)
-	require.NoError(t, err)
-	defer func() {
-		// Make sure the sandbox is cleaned up in any case.
-		runtimeService.StopPodSandbox(sb)
-		runtimeService.RemovePodSandbox(sb)
-	}()
+	sb, _ := PodSandboxConfigWithCleanup(t, "sandbox", "test-runtime-handler")
 
 	t.Logf("Verify runtimeService.PodSandboxStatus() returns previously set runtimeHandler")
 	sbStatus, err := runtimeService.PodSandboxStatus(sb)