Add a uuid based verification of attached state for a volume

[govint]

govc vm.Info -vm.ip is the command used to fetch VM meta-data and it needs the calling test functions to have a sleep-wait for a few seconds before issuing the govc command. Instead use the waitip option to govc and it does the wait instead.

The time delay isn't removed completely but it may make it more precise than to wait for a fixed number of seconds in the test code.

[govint]

Tried this out but still hitting the "no such VM" error with govc,
2017/07/13 12:18:27 Fetching full name for volume [vmlistener_test_volume_823192] from VM [10.161.248.164]
2017/07/13 12:18:28 Full volume name: [vmlistener_test_volume_823192@sharedVmfs-0]
2017/07/13 12:18:32 govc vm.info --waitip=true -vm.ip=10.161.248.164 -json | jq -r .VirtualMachines[].Name
2017/07/13 12:18:32 Expected Attached VM name is [govc: no such VM]
2017/07/13 12:18:32 Attached VM name from Docker CLI is [worker1-VM1.0]
2017/07/13 12:18:32 Attached VM name from Admin CLI is [worker1-VM1.0]

Debugging and will post if this option is usable.

[govint]

Closing for now, govc doesn't seem to be able to wait for the VM to acquire an IP from multiple test runs. Will raise an issue on govc.

[govint]

1. Add a VerifyAttachedStatusByUuid() to allow fetching VM name by UUid and using that to verify attached state.
2. (1) saves the 15s timeout after a VM suspend where govc returns error trying to get VM name with the IP.
3. Move the sleep in esxcli.go:WaitForExpectedState() and vdvs.go:IsVDVSRunning() to after the check on the required state vs. sleeping fist and then checking.
4. (4) save at least 8s whenever IsVDVSRunningAfterVMRestart() is called.

[govint]

Opening a new issue with a few enhancements to reduce the time taken in E2E tests. Closing this one.