Install Scripts: Decouple scripts from Vagrant

autoInstaller.sh has a dependency on vagrant - remove it

Add options and implementation for:
    * enabling development directories creation - allows a vagrant VM
      to be used for automated testing
    * Alternate VistA-M repo
    * Post install hook
    * Skip Testing

Change-Id: I0f27627dcceb42aa0f3aa91df338d2d7b5648087