## What changes were proposed in this pull request?

This PR proposes the fix the use of `contains` API which only exists from Scala 2.11.

## How was this patch tested?

Manually checked:

```scala
scala> val o: Option[Boolean] = None
o: Option[Boolean] = None

scala> o == Some(false)
res17: Boolean = false

scala> val o: Option[Boolean] = Some(true)
o: Option[Boolean] = Some(true)

scala> o == Some(false)
res18: Boolean = false

scala> val o: Option[Boolean] = Some(false)
o: Option[Boolean] = Some(false)

scala> o == Some(false)
res19: Boolean = true
```

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #15393 from HyukjinKwon/hotfix.