Analyzes a multistatus response from the OC server to generate an appropriate result.
In WebDAV, a MOVE request on collections (folders) can be PARTIALLY successful: some
children are moved, some other aren't.
According to the WebDAV specification, a multistatus response SHOULD NOT include partial
successes (201, 204) nor for descendants of already failed children (424) in the response
entity. But SHOULD NOT != MUST NOT, so take carefully.