Enable created_at/updated_at for port-show/chassis-show

Our node-show support created_at/updated_at two fields now,
but port-show and chassis-show dont support, enable them
for debugging/auditing

Change-Id: Id1bb970d852c2c971d45426d23a61ab7c6698a6c
Partial-Bug: #1244107
Include 'chassis_id' on node-show

'chassis_id' shows the association between the node and the chassis it
belongs to.

The patch also alpha-sort the list of properties to make it easy to
read.

Change-Id: I95bc2b9f849ac884bc551ea32eca1352a3081b95
Closes-Bug: #1253798
Merge "Include 'chassis_id' on node-show"