GMPLS update - 50: corrections in standard MPLS tunnel API

Added #corrections in the #standard #MPLS #external #API in GMPLS module. The #cross-connect based #index #removal #step has been added in the tunnel removal routine. The #standard #extended #MPLS #entries and the #standard #GMPLS #error #entries routines has been #chain #linked in the create / remove routines for the external tunnel API. This ensures a hierarchical handling of these entries in the #create / #remove #sequence s.

#GMPLS update 50 ...
[commit dcb116b3d6a3431f9d348f167fc9df1df95f66f2] (https://github.com/nes-repo/NES-Open-Switch/commit/dcb116b3d6a3431f9d348f167fc9df1df95f66f2)