Move framework ssh code to new package

The framework/ssh.go code was heavily used throughout the framework
and could be useful elsewhere but reusing those methods requires
importing all of the framework.

Extracting these methods to their own package for reuse.

Only a few methods had to be copied into this package from the
rest of the framework to avoid an import cycle.

test/e2e/node/kubelet.go

@@ -30,6 +30,7 @@ import (
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/kubernetes/test/e2e/framework"
 	e2elog "k8s.io/kubernetes/test/e2e/framework/log"
+	e2essh "k8s.io/kubernetes/test/e2e/framework/ssh"
 	"k8s.io/kubernetes/test/e2e/framework/volume"
 	testutils "k8s.io/kubernetes/test/utils"
 	imageutils "k8s.io/kubernetes/test/utils/image"
@@ -214,9 +215,9 @@ func checkPodCleanup(c clientset.Interface, pod *v1.Pod, expectClean bool) {
 	for _, test := range tests {
 		e2elog.Logf("Wait up to %v for host's (%v) %q to be %v", timeout, nodeIP, test.feature, condMsg)
 		err = wait.Poll(poll, timeout, func() (bool, error) {
-			result, err := framework.NodeExec(nodeIP, test.cmd)
+			result, err := e2essh.NodeExec(nodeIP, test.cmd, framework.TestContext.Provider)
 			Expect(err).NotTo(HaveOccurred())
-			framework.LogSSHResult(result)
+			e2essh.LogResult(result)
 			ok := (result.Code == 0 && len(result.Stdout) > 0 && len(result.Stderr) == 0)
 			if expectClean && ok { // keep trying
 				return false, nil