Local file changed during sync can still trigger error timeouts

[TheOneRing]

git grep "Local file changed during sync" -- .\src\
src/libsync/propagateupload.cpp:        done(SyncFileItem::Message, tr("Local file changed during sync. It will be resumed."));
src/libsync/propagateuploadng.cpp:            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));
src/libsync/propagateuploadtus.cpp:            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));
src/libsync/propagateuploadv1.cpp:            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));

[erikjv]

This happens in TestChunkingNG::testCreateConflictWhileSyncing

[HanaGemela]

Steps to recreate:

1. Lock a file by opening Word
2. Modify the file and keep it open
3. Save the file -> triggers sync

Actual result: Three attempts -> blacklisted file
Expected result: Locked and not uploaded, in the not sync tab, uploaded after closing the file

[bishwasojha]

• when a file is open in Word/LibreOffice , file is Locked and not uploaded, file lies in the not sync tab
• After a file is closed, file is uploaded to server