DBManager: executeRaw: explicitly close connection

and some more logging
OsdDbDAO: remove.
FsService: emit log-message when server is ignored.
ProjectService: fix getNewVolumeLocation and extend getVolumeIDs

getNewVolumeLocation do not append ".readonly" if its already in
the volume name
getVolumeIDs now accepts servers-args as filter
OSDVolumeDAO_parse.py: check line before scanning it
OSDVolService.py: avoid runtime error
examples/emptyServers.py: add new options

--solitaryrovols: move solitary rovols
--minsize" : only move volumes with minimalsize of
--osdvolumes : also mov eosd -volumes
examples/manageProjects.py: add and mangle options

--showVolumes : shows Volumes belonging to a project on a server
--server : specify server