ci/tests: failed_state_test.go might need to allow additional state

[unakatsuo]

https://ci.openvdc.org/blue/rest/organizations/jenkins/pipelines/citest/branches/master/runs/179/nodes/36/log/

got an error

=== RUN   TestFailedState_RebootInstance
--- FAIL: TestFailedState_RebootInstance (5.21s)
	00_run_cmd.go:115: Unexpected Instance State: i-0000000009 goal=FAILED found=RUNNING

Each scenario in the file waits for FAILED state with transitional states. But the failure is detected since the origin state is not added to WaitInstance(). Possible symptom is:

1. Once the instance became RUNNING, openvdc reboot is issued.
2. The command is not reached to the executor yet so the state is kept to RUNNING.
3. The first attempt from WaitInstance() sees RUNNING but it is not listed as intermidiate states like []string{"REBOOTING"}

func TestFailedState_RebootInstance(t *testing.T) {
	stdout, _ := RunCmdAndReportFail(t, "openvdc", "run", "centos/7/null", `{"crash_stage": "reboot"}`)
	instance_id := strings.TrimSpace(stdout.String())

	WaitInstance(t, 5*time.Minute, instance_id, "RUNNING", []string{"QUEUED", "STARTING"})
	RunCmdAndReportFail(t, "openvdc", "reboot", instance_id)
	WaitInstance(t, 5*time.Minute, instance_id, "FAILED", []string{"REBOOTING"})
}

[unakatsuo]

The executor crashed as expected

May 22 09:21:16 executor-null vdc-executor[11016]: 2017-05-22 09:21:16 [ERROR] openvdc-executor/main.go:436 Failed to reboot instance Error: Emulate crash at RebootInstance
                                                   ErrorStackTrace:
                                                   github.com/axsh/openvdc/hypervisor/null.(*NullHypervisorDriver).RebootInstance
                                                           /var/tmp/go/src/github.com/axsh/openvdc/hypervisor/null/null.go:85
                                                   main.(*VDCExecutor).rebootInstance
                                                           /var/tmp/go/src/github.com/axsh/openvdc/cmd/openvdc-executor/main.go:317
                                                   main.(*VDCExecutor).FrameworkMessage
                                                           /var/tmp/go/src/github.com/axsh/openvdc/cmd/openvdc-executor/main.go:416
                                                   github.com/axsh/openvdc/vendor/github.com/mesos/mesos-go/executor.(*MesosExecutorDriver).frameworkMessage.func1
                                                           /var/tmp/go/src/github.com/axsh/openvdc/vendor/github.com/mesos/mesos-go/executor/executor.go:481
                                                   github.com/axsh/openvdc/vendor/github.com/mesos/mesos-go/executor.NewMesosExecutorDriver.func2.1
                                                           /var/tmp/go/src/github.com/axsh/openvdc/vendor/github.com/mesos/mesos-go/executor/executor.go:112
                                                   runtime.goexit
                                                           /usr/lib/golang/src/runtime/asm_amd64.s:2086