Update replication plugin

The replication is updated to include the following changes:
* a9fcff5 Create missing repositories on the remote site
* ad923e4 Support replication of project deletions

a9fcff5 is a change in behaviour of the replication plugin and a
warning about this should be added to the release notes.

Change-Id: Ic5c643c8a10b27e61e0a34fe15acfdc0cdec9c9d
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>