Update git submodules

* Update plugins/replication from branch 'stable-2.15'
  to 0df288afccb53b7abbe4f2ee90f68c80e9dcd2c7
  - ReplicationFileBasedConfig: Fix setting default sshConnectionTimeout
    
    The default value did not get set when the replication config did not
    exist, was empty, or was invalid. This is not really a problem since
    if there is no config, no SSH connections are made anyway.
    
    A more serious issue is that the value was read with minutes as the
    default time unit, but then converted to milliseconds using seconds as
    the time unit, which resulted in an incorrect value.
    
    Change-Id: I64906e29acb56f0f53b432db61d2707dfe1963d3
    
diff --git a/plugins/replication b/plugins/replication
index 7f94fed..0df288a 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 7f94fed1b567713a629f7621ff2c511767e448ab
+Subproject commit 0df288afccb53b7abbe4f2ee90f68c80e9dcd2c7