Break dps modules into client and server


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12571 e27351fd-9f3e-4f54-a53b-843176b1656c
service module is now obsolete


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12572 e27351fd-9f3e-4f54-a53b-843176b1656c
DirectoryProxyServiceMaker is in a new module now


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12573 e27351fd-9f3e-4f54-a53b-843176b1656c