Enable rsync daemon on swift-storage

By default the rsync service is disabled on ubuntu
i.e. RSYNC_ENABLE=false in /etc/default/rsync.

Swift replication needs the rsync service. On ubuntu this change
replaces 'RSYNC_ENABLE=false' with 'RSYNC_ENABLE=true' in
/etc/default/rsync.
On fedora it replaces 'disable = yes' with 'disable = no'.

This patch also includes a missing EOF in
elements/swift-storage/install.d/76-swift-storage-common

Change-Id: I33760300074cf6500d142c2294ddb6322556115f
Merge "Enable rsync daemon on swift-storage"