Move ceph repo options to nested

Change-Id: I8444a5468b48675d84c9069207fe49b98cce89c0

docker/radosgw/Dockerfile.j2

@@ -2,8 +2,8 @@ FROM {{ image_spec("openstack-base") }}
 MAINTAINER {{ maintainer }}
 
 COPY {{ render('sources.list.debian.j2') }} /etc/apt/sources.list.d/ceph.list
-RUN apt-key adv --recv-keys --keyserver {{ url.ceph_repository_keyserver }} \
-    {{ url.ceph_repository_keyid }} \
+RUN apt-key adv --recv-keys --keyserver {{ url.ceph.debian.keyserver }} \
+    {{ url.ceph.debian.keyid }} \
     && apt-get update \
     && apt-get install -y --no-install-recommends radosgw \
     && apt-get clean \

docker/radosgw/sources.list.debian.j2

@@ -1 +1 @@
-deb {{ url.ceph_repository }} jessie main
+deb {{ url.ceph.debian.repo }} jessie main

service/files/defaults.yaml

@@ -7,6 +7,8 @@ configs:
       cont: 7480
     key: "Changeme"
 url:
-  ceph_repository: http://eu.ceph.com/debian-jewel
-  ceph_repository_keyserver: hkp://keyserver.ubuntu.com:80
-  ceph_repository_keyid: 460F3994
+  ceph:
+    debian:
+      repo: http://eu.ceph.com/debian-jewel
+      keyserver: hkp://keyserver.ubuntu.com:80
+      keyid: 460F3994