GMPLS update - 54: updating standard extended tunnel agent mapper routines

Updated #standard #extended #tunnel #parameter agent routines in GMPLS module. The agent #iterator routines and #mapper #routine has been updated to use standard #tunnel #based #indexing. This will access the extended tunnel entries #embedded in the standard #MPLS #tunnel entries and there by removing the redundant indexing. The extended tunnel entries contain attributes like the #opposite-dir-tunnel pointer, #tunnel-index and the #tunnel-instance for the reverse tunnel, etc ...

#GMPLS update 54 ...
[commit de853288644aaeacaa5c9c5d2a45a40aa6ca1df6] (https://github.com/nes-repo/NES-Open-Switch/commit/de853288644aaeacaa5c9c5d2a45a40aa6ca1df6)