Renamed the unit test for objectstore so they all fall in the same group.

Corrected a typo in hpp filename and added content for OStoreDB::queue(const RetrieveToDirRequest& rqst)

Changed name of keytab file in configuration and added xroot server documentation in the latex document

Added support for tape addition in scheduler db interace.
Expanded usage or CreationLog class.

Renamed DirEntry::getOwnerId() and DirEntry::getGroupId() to DirEntry::getUid() and DirEntry::getGid() respectively

Added constraints: we refuse to dump routes when they are not all set, and no 2 routes should point to the same tape pool.

Adapted the RootEntry to the non-permissive mode where overwrites and implicit deletions are not allowed.
Adpater the unit test of RootEntry.
Fixed an improper locking in a RootEntry unit test

the uid and gid of the CTA user that owns the file.