Merge pull request #13525 from owncloud/s2s-fixscanfileforbrokenstorage

Catch storage exception in scanner for remote shares

diff --cc apps/files_sharing/ajax/external.php
Simple merge

diff --cc apps/files_sharing/js/external.js
Simple merge

diff --cc apps/files_sharing/lib/external/storage.php
Simple merge

diff --cc lib/private/files/view.php
Simple merge