relocate docker

Signed-off-by: rootfs <hchen@redhat.com>
add vagrant recipe to deploy tachyon cluster on virtualbox and aws

Signed-off-by: rootfs <hchen@redhat.com>
doc and check that vagrant version 1.6.5 is required
review feedback:change image name from TachyonSlave to TachyonWorker
review feedback: not use aws subnet_id right now

Signed-off-by: rootfs <hchen@redhat.com>
review feedback: remove obsolete comment

Signed-off-by: rootfs <hchen@redhat.com>
Merge pull request #486 from rootfs/vagrant-short

[TACHYON-127] Deploy Tachyon Cluster through Vagrant