Ensure test always creates a schedule in the future.
Ensure test always creates a schedule in the future.

This test was only creating a schedule in the future sometimes based on your local timezone.
Created in 143639f6569.

Timezones are hard.

Since we would rather not deal with timezones, add 2 days to avoid any possible overlap.
I also threw on utc just to make sure.

Problem:
We were trying to create a schedule to run at 00:00:00 UTC on the next day.
If my timezone is EDT (-4:00) and it's 21:00:00 on May 7th, it's May 7th here but May 8th in UTC.

We construct a UTC schedule time based on only the Year, Month, Day of my local time[1].
So, if it's May 7th, 2015 at 21:00:00, we'd ignore the fact that it's May 7th local time but May 8th UTC.
In this window of 20:00:00-23:59:59 EDT, this schedule created would be in the past.

[1] https://github.com/ManageIQ/manageiq/blob/eec2e177ee8b40d263a30821b9128dde0992fe60/vmdb/app/controllers/ops_controller/settings/schedules.rb#L652-L654

Fixes the following sporadic test failure:

```
  1) OpsController OpsSettings::Schedules schedule additon #does not allow duplicate names when adding
     Failure/Error: assigns(:flash_array).first[:message].should include("Name has already been taken")
       expected "Warning: This 'Run Once' timer is in the past and will never run as currently configured" to include "Name has already been taken"
     # ./spec/controllers/ops_settings_spec.rb:123:in `block (4 levels) in <top (required)>'

  2) OpsController OpsSettings::Schedules schedule additon #does not allow duplicate names when editing
     Failure/Error: assigns(:flash_array).first[:message].should include("Name has already been taken")
       expected "Warning: This 'Run Once' timer is in the past and will never run as currently configured" to include "Name has already been taken"
     # ./spec/controllers/ops_settings_spec.rb:133:in `block (4 levels) in <top (required)>'
```
(transferred from ManageIQ/manageiq@1e517aacf5fd21f20bf0cce25e7c96bfc7382a80)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic