check whether user belongs to the backend before calling getHome()
LDAP: do not store user home as it destroys configurability. always fetch it. use of cache is save however, it is cleared when settings are saved
code style
LDAP: version bump -> clean up database
LDAP: fix settings handling of homeFolderNamingRule option
LDAP: fix database cleanup in update  script
Merge pull request #1493 from owncloud/fix_ldap_stored_homedir

Fix ldap stored homedir