[neohub] Quality improvements (#10522)

[neohub] Quality improvements (#10522)

* [neohub] eliminate once in a blue moon fin-ack fin-ack issues

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* Revert "[neohub] eliminate once in a blue moon fin-ack fin-ack issues"

This reverts commit 022513ee85878f2f9cf2fd27fa3d79d251197c5a.

* [neohub] extra hub properties; hub id in logs (help for multiple hubs)

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] run spotless

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] getFirmwareVersion returns null for unknown

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] api version enum; tweaked logging

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] fix mvn warning

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] cosmetic for diff

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] device info property, and comments

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] tweaks to fin-ack sequence

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] eliminate irrelevant compiler warnings, and live test errors

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] avert merge conflict with #10525

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
* [neohub] apply changes in anticipation of reviewer approval

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>