fix init-mongo.sh

Author: m4r1k

readme-vars.yml

@@ -75,9 +75,9 @@ app_setup_block: |
     mongo_init_bin='mongo'
   fi
   "${mongo_init_bin}" <<EOF
-  use "{MONGO_AUTHSOURCE}"
+  use ${MONGO_AUTHSOURCE}
   db.auth("${MONGO_INITDB_ROOT_USERNAME}", "${MONGO_INITDB_ROOT_PASSWORD}")
-  use "${MONGO_DBNAME}"
+  use ${MONGO_DBNAME}
   db.createUser({
     user: "${MONGO_USER}",
     pwd: "${MONGO_PASS}",