SSH: Fix some potential crashes.

Change-Id: I102e35c3dcd3725f357c91d9f0a77ab28d881b0d
Reviewed-by: Oliver Wolff <oliver.wolff@nokia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>

src/libs/ssh/sshconnectionmanager.cpp

@@ -154,7 +154,7 @@ public:
         if (doDelete) {
             disconnect(connection, 0, this, 0);
             m_deprecatedConnections.removeAll(connection);
-            delete connection;
+            connection->deleteLater();
         }
     }