setup: support mount points in raid script
setup: support mount points in raid script

By default behavior is kept the same. There are deployments in which we
would like to mount data and commitlog to different places - as much as
we have avoided this up until this moment.

One example is EC2, where users may want to have the commitlog mounted
in the SSD drives for faster writes but keep the data in larger, less
expensive and durable EBS volumes.

Signed-off-by: Glauber Costa <7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>
Message-Id: <1488258215-2592-1-git-send-email-7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>

scylladb/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,duarten/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla