System chassis-port indexing update

Removing unwanted #chassis-port #mapping routines in #system module.

System update 23 ...
[commit 39b1d960b0e810cfe96e9b89e7870fe5251d2afa]

System port entity update - 3

Adding new #port entity parameters in #system module for #entity #framework. These will assist in #chassis-port mapping support. Adding chassis-port #indexing routines.

System update 22 ...
[commit 1f4c1b541050788b8a1f7cc0fa3cf6ce1da7d7bb]