Added Ansible configuration so that sets up:
1. Java (v7 rather than 6)
2. Scala
3. SBT

Configuration has been taken from https://github.com/BTBurke/skeleton-vagrant-scala-sbt
Next steps:

1. Switch to running Ansible Playbook from client rather than host
Need to switch Vagrant to running a bash script rather than the playbook
Bash script installs Ansible on client then runs Ansible playbook
See:
https://github.com/KSid/windows-vagrant-ansible bash script

2. Switch to Java 6 rather than 7 (so that it is EMR compatible)