Adding Keystone to MDG Dockerfiles

Included environment files.
Admin password selection and storage needs to be discussed.

Change-Id: Ibcaa818bcc3ae6fd013507b0b114b15b70e60150
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>
diff --git a/docker/Keystone/Makefile b/docker/Keystone/Makefile
new file mode 100644
index 0000000..d64462a
--- /dev/null
+++ b/docker/Keystone/Makefile
@@ -0,0 +1,3 @@
+include ../mk/Makefile.include
+
+MDG=$(shell basename $(CURDIR))