Milan Stovicek 3ce7c0cf3f
Add suspend into a list of available actions
`suspend` action is not listed, even though it can be used and it works.

```
$ vagrant --version
Vagrant 2.1.1
```

```
config.trigger.before [:suspend] do |trigger|
  trigger.name = "Before suspend"
  trigger.run = {inline: "..."}
end
````
2018-06-13 18:51:45 +02:00
..
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