Add container-reconciler daemon

This daemon will take objects that are in the wrong storage policy and
move them to the right ones, or delete requests that went to the wrong
storage policy and apply them to the right ones. It operates on a
queue similar to the object-expirer's queue.

Discovering that the object is in the wrong policy will be done in
subsequent commits by the container replicator; this is the daemon
that handles them once they happen.

Like the object expirer, you only need to run one of these per cluster
see etc/container-reconciler.conf.

DocImpact
Implements: blueprint storage-policies
Change-Id: I5ea62eb77ddcbc7cfebf903429f2ee4c098771c9

bin/swift-container-reconciler

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from swift.container.reconciler import ContainerReconciler
+from swift.common.utils import parse_options
+from swift.common.daemon import run_daemon
+
+if __name__ == '__main__':
+    conf_file, options = parse_options(once=True)
+    run_daemon(ContainerReconciler, conf_file, **options)