GMPLS update - 49: updating standard extended GMPLS tunnel agent mapper routines

Updated #standard #extended GMPLS #tunnel agent mapper routines in GMPLS module. The agent #iterator routines and #mapper #routine has been updated to use standard MPLS entry based #indexing. This will access the port entries by using the #native #indexing. This removes references to the standard GMPLS tunnel indexing used earlier.

#GMPLS update 49 ...
[commit 90283fae86531136445cab03fefd560feb73bd60] (https://github.com/nes-repo/NES-Open-Switch/commit/90283fae86531136445cab03fefd560feb73bd60)