1. Erase empty or corrupt lockfile, when reading it fails and
   skip "Locked Document Dialog" in that case
2. Show Dialog (use LockFileIgnoreRequest -> LockFailedQueryBox)
   when create lock file is not possible.
   Two Dialogs:  "lock file create error" and
                 "empty lockfile is present"
   Set the document to read-only when creating lockfile is not
   possible. If lockfile is corrupt or empty, inform the user.
   They can interrupt loading the document or open it read-only,
   which also erases the corrupt lock file after closing
   the document
3. Handling for the two Dialogs
   Use LockFileIgnoreRequst for create lockfile error and
   add a new LockFileCorruptRequest, (lock file is corrupt).
   Change and generate new messages for both dialogs in english

Change-Id: I35c377f85b5113e8ffb89d83b9544b8ebc81d89f
Reviewed-on: https://gerrit.libreoffice.org/36658Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>