Automatic merge from submit-queue

Node E2E: Move host info around test result.

Discussed offline with @yujuhong and @dchen1107. Currently, the node e2e result is organized as:
```
================================================================
Success Finished Host tmp-node-e2e-b6c375c7-e2e-node-containervm-v20160321-image Test Suite
{ginkgo-output}
{framework-error}
================================================================
```
This makes it painful to find which image the test is failing on. The `{ginkgo-output}` is usually quite long, so we have to scroll mouse up and down to find the host name.
This PR changes the test result to:
```
================================================================
Start Host tmp-node-e2e-b6c375c7-e2e-node-containervm-v20160321-image Test Suite
{ginkgo-output}
Success Finished Host tmp-node-e2e-b6c375c7-e2e-node-containervm-v20160321-image Test Suite
{framework-error}
================================================================
```
This is not perfect, but much better than before. We can easily find the host name under the ginkgo test result, like this:
```
================================================================
Start Host test-gci-dev-54-8743-3-0 Test Suite
Running Suite: E2eNode Suite
============================
Random Seed: 1472511489 - Will randomize all specs
Will run 0 of 131 specs

Running in parallel across 8 nodes

I0829 22:58:13.727764    1143 e2e_node_suite_test.go:98] Pre-pulling images so that they are cached for the tests.
I0829 22:58:28.562459    1143 e2e_node_suite_test.go:111] Node services started.  Running tests...
I0829 22:58:28.562477    1143 e2e_node_suite_test.go:116] Wait for the node to be ready

SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
------------------------------
I0829 22:58:29.742596    1143 e2e_node_suite_test.go:136] Stopping node services...
I0829 22:58:29.742650    1143 services.go:673] Killing process 1423 (services) with -TERM
I0829 22:58:29.860893    1143 e2e_node_suite_test.go:141] Tests Finished


Ran 0 of 131 Specs in 16.185 seconds
SUCCESS! -- 0 Passed | 0 Failed | 0 Pending | 131 Skipped 

Ginkgo ran 1 suite in 19.939034297s
Test Suite Passed

Success Finished Host test-gci-dev-54-8743-3-0 Test Suite
================================================================
```

In a following PR, I'll print the test result from different images into different files to make it more clear for debugging. Mark v1.4 because this helps us de-flake test.

/cc @kubernetes/sig-node