ExternalStorage: SmbListener will not be triggered after the SmbScanner

[rootinier]

Describe the bug

An initial mount of an external storage(CIFS/SMB) detects all files and nodes correctly by the SmbScanner class.
But the SmbListener which detects all the changes on the mounted files and nodes will not be triggered.

To Reproduce

1. Create an external storage(CIFS/SMB)
2. Make changes on the external storage

Expected behavior

Changes on the external storage should be detected without the option FORCE_SPAWN for the SmbListener as a workaround.

Environment

• balloon server version: 2.6.9
• Deployed as: docker
• PHP version: 7.3.12
• MongoDB version: 3.6.14