Added "qos_network_policy_id" to "port show" command. Because this is
just a read-only parameter and is read from the SDK port definition,
this patch only modifies the corresponding tests.
This patch is adding this new parameter to the test bench.
Change-Id: Ice7423e0e0b98a39cc36622b70eae5a8493a037c
Closes-Bug: #1851362