NXDRIVE-147: Allow to get top level pair state from Controller + factorize
NXDRIVE-147: Add last_remote_modifier to LastKnownState
NXDRIVE-147: Don't run self-conflict test if not implemented server-side
NXDRIVE-147: Fix test comment
NXDRIVE-147: Implement self-conflict automatic resolution
NXDRIVE-147: Get lastContributor metadata from remote document / FileSystemItem
NXDRIVE-147: Fix lastContributor fetch by remote_document_client
NXDRIVE-147: Fix remote_file_system_client test
NXDRIVE-147: Wait for 1 sec in self-conflict test to ensure the time difference
NXDRIVE-147: Fix existing conflict tests (using a different remote user than the local one)