Automatic merge from submit-queue
always clean gce resources in service e2e
@bprashanth the previous PR was closed when I squashed my commits.
Here is the new change set, please help to review again.
1). only the following two It() create, I created a string array to persist the LB name so that they can be cleaned in AfterEach(), and the string array was reset after clean up.
```
"should be able to change the type and ports of a service [Slow]"
"should be able to create services of type LoadBalancer and externalTraffic=localOnly"
```
2). Directly call gce api to delete the resource and ignore any error returned.
3b19fb9581