Adding a few more variables to Keystone Docker

It introduces the Keystone host variable which should help in
Kubernetes distributions. It also checks if the database was
created but it is empty.

Change-Id: I7c4bf7423023825f21accc1d34c4d858596b2fd9
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>
4 files changed