openchangedb: get_parent_if() should return error when input fid is not found
provosition/mailbox: Don't lowercase Organization and OU names for Free/Busy provision

Openchange compares object names in case sensitive mode
Hence, provisioned folder name is going to be not-searchable
with restrictions for instance
emsmdbp: refactor functions searching for either org or group
emsmdbp_object: sanity and error checks