Get ec2 tests working

Signed-off-by: Ken Barber <ken@bob.sh>
Add extra box configs and fix source based installation

Signed-off-by: Ken Barber <ken@bob.sh>
Remove extraneous comment, rename centos-64 box

Signed-off-by: Ken Barber <ken@bob.sh>
foo

Signed-off-by: Ken Barber <ken@bob.sh>