New docker folder. Added env files for some dockers

Change-Id: I528c8f3c4259b2e265cde6afd268e8384c40601f
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/docker/ro-db.env b/installers/docker/ro-db.env
new file mode 100644
index 0000000..6f7297e
--- /dev/null
+++ b/installers/docker/ro-db.env
@@ -0,0 +1 @@
+MYSQL_ROOT_PASSWORD=osm4u