Dockerfile update. Allow configure openmanod with ENV

Change-Id: I02edb2455735b514e7483ad0a250118f07726f56
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/docker/openmano-compose.yml b/docker/openmano-compose.yml
index 253e957..d83b72d 100644
--- a/docker/openmano-compose.yml
+++ b/docker/openmano-compose.yml
@@ -5,10 +5,7 @@
     container_name: osm-ro-db
     restart: always
     environment:
-      - MYSQL_RANDOM_ROOT_PASSWORD=true
-      - MYSQL_DATABASE=mano_db
-      - MYSQL_USER=mano
-      - MYSQL_PASSWORD=manopw
+      - MYSQL_ROOT_PASSWORD=osm4u
   osm-ro:
     build:
       context: ../
@@ -17,10 +14,8 @@
     container_name: osm-ro
     restart: always
     environment:
-      - DB_USER=mano
-      - DB_PSWD=manopw
-      - DB_NAME=mano_db
-      - DB_HOST=osm-ro-db    
+      - RO_DB_ROOT_PASSWORD=osm4u
+      - DB_HOST=osm-ro-db
     ports:
       - "9090:9090"
     volumes: