Adding Keystone environment variables to NBI

Adding the necessary environment variables to the
NBI MDG Dockerfile in order for the Keystone authentication
to work.

Completing the docker-compose yaml, fixing renaming typo
in keystone dockerfile and updating environment file
creation.

Change-Id: I4eb15119f4dba304494ef16fc90eea8d8c230927
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>
diff --git a/installers/docker/docker-compose.yaml b/installers/docker/docker-compose.yaml
index 3917c9e..38d322d 100644
--- a/installers/docker/docker-compose.yaml
+++ b/installers/docker/docker-compose.yaml
@@ -75,6 +75,8 @@
     environment:
       OSMNBI_DATABASE_HOST: mongo
       OSMNBI_MESSAGE_HOST: kafka
+    env_file:
+      - ./nbi.env
     ports:
       - "${OSM_NBI_PORTS:-9999:9999}"
     #depends_on: