update vagrant provisioning to install ruby2.1
update vagrant provisioning to install ruby2.1

grahamb/canvas-lms,grahamb/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms