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/installers/docker/__keystone__.env b/installers/docker/__keystone__.env
new file mode 100644
index 0000000..0b937e4
--- /dev/null
+++ b/installers/docker/__keystone__.env
@@ -0,0 +1,4 @@
+ROOT_DB_PASSWORD=__MYSQL_ROOT_PASSWORD__
+KEYSTONE_DB_PASSWORD=__KEYSTONE_DB_PASSWORD__
+#ADMIN_PASSWORD=__ADMIN_PASSWORD__
+NBI_PASSWORD=__NBI_PASSWORD__