The other method for running which java doesn't work on OSX, as java is installed as an empty shim when not installed in the base OSX image:
```
vagrant:~ vagrant$ java
No Java runtime present, requesting install.
vagrant:~ vagrant$ /usr/libexec/java_home --failfast
Unable to find any JVMs matching version "(null)".
vagrant:~ vagrant$
```
We can use the `/usr/libexec/java_home --failfast` command to check if
java is actually present first.
Originally-by: Peter Souter <peter.souter@puppetlabs.com>
dadc7a6c22