Entity that has the same label as existing entity will not be imported

[D063520]

When importing for example first P805 and then P1343 the import will fail because in "Luxembourgish" (a language) the label is the same:

Failed to add P1343
[2019-02-21 16:02:54]: Property [[Property:P207|P207]] already has label "Beschriwwen an" associated with language code lb.

[D063520]

The solution is to replace in src/EntityImporter in the function createEntity this part:

$result = $this->entityStore->saveEntity(
$entity,
'Import entity',
$this->importUser,
EDIT_NEW | EntityContent::EDIT_IGNORE_CONSTRAINTS
);