Added missing tests, new configuration with HikariCP and bumped Play version

Added the remaining tests for `play2-java-jpa`:

* /fortunes
* /update
* /plaintext

Also added a new benchmark configuration based on `play2-java-jpa` but using the [HikariCP plugin](https://github.com/edulify/play-hikaricp.edulify.com). This allows the default BoneCP connection pool to be replaced with HikariCP.
I suggest renaming "JPA" to "JPA BoneCP" here so that the difference between the two frameworks is really clear. I understand that BoneCP is the default but I don't think it will hurt to spell out the difference to anyone who is reading the results!