oc/util: Tune dbmsgreader for new caching classes names
oc: Set log level to 0 in samba-get-config script - it is very chatty during builds

This script is very "chatty" when "log level" is set to a high number
(usual scenario on developer machine)
oc: Make sure we always use NSString keys in 'messages' dictionary

Different types for keys in Dictionaries leads to not finding
expected entry - we should make sure that everythime we set/get
entry from a dictionary, key object type is same
oc/MailFolder: Add more logging so we can trace invalid message kyes
Merge pull request #33 from Zentyal/kamenim/master-fix-globcnt-is-0-crashes

Fix sogo_folder_get_deleted_fmids() to return 0 as a globcnt (leads to crashes in OC layer)