waylandloginmanager: reduce the wait time for the next attempt to start the server, so that the failed dialog appears sooner. Users might not wait 25 seconds after the splash screen disappears and it seemingly does nothing. The long delays where for keeping the tty semi-usable when weston failed, before there was a limit. 

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3045 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9