GMPLS update - 45: upgrading standard MPLS tunnel configuration entries

Upgraded #standard MPLS #tunnel #configuration entries in GMPLS module. The #tunnel-name and #tunnel-description has been set to #limited #size in-line with commonly used #max-limit. The #cross-connect #pointer and #resource-pointer has been removed and the #cross-connect-index and #resource-index defined in #custom MPLS #tunnel #configuration entries will be used instead. This removes the long (and memory hogging) pointer format and uses light weight integer indexes in to the respective configuration entries.

#GMPLS update 45 ...
[commit cccb0939bb1b20fe20ab244bacb71ed432179420] (https://github.com/nes-repo/NES-Open-Switch/commit/cccb0939bb1b20fe20ab244bacb71ed432179420)