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/docker/mk/Makefile.include b/docker/mk/Makefile.include
index 81529f3..54ef41a 100644
--- a/docker/mk/Makefile.include
+++ b/docker/mk/Makefile.include
@@ -17,7 +17,7 @@
 CMD_DOCKER_ARGS ?= -q
 DOCKER_ARGS     = $(CMD_DOCKER_ARGS)
 
-DEPS := MON IM LCM RO common osmclient devops NBI POL
+DEPS := MON IM LCM RO common osmclient devops NBI POL Keystone
 
 DEPS_TARGETS = $(addprefix $(MKBUILD)/.dep_, $(DEPS))